Tests for assessing the animal-human relationship in tied dairy cows have been used in experimental research, but the reliability and feasibility of the measures in the on-farm context has not been studied yet. Therefore we investigated the between-experimenter repeatability of avoidance reactions in dairy cows housed in tie-stall systems. Nine farms in Austria with 15-60 tethered dairy cows were visited. Two to three out of four experimenters were testing the avoidance reaction of the individual cows in a balanced order. Cows were approached slowly from the front and the reactions recorded on an 11-point score. The avoidance reaction of each cow was assessed twice by each experimenter and averaged. Also, a farm value per experimenter was calculated (median). Repeatability between experimenters was assessed within farms and at farm level by calculating Spearman rank correlation coefficients. The average between-experimenter correlations within farms ranged from 0.37 to 0.88. At farm level, median of scores ranged from 2.5 to 6.75 and correlated moderately to highly between experimenters from 0.65 to 0.80. Testing the animals on all farms was relatively simple.

The between-experimenter repeatability within farms differed substantially and reasons for this merit further investigation. At farm level repeatability was moderate to sufficiently high. Due to the high feasibility, this measure seems to be promising and should be developed further.

The relationship between social behaviour and skin injuries (caused by horns) of loose housed horned cows was investigated on 35 dairy farms. While the frequencies of two agonistic behaviour elements (push and chase away) were positively correlated with the occurrence of skin injuries, the frequencies of butting and horning were not. Butting appears to have an ambivalent motivation, in that its occurrence is correlated positively both with agonistic behaviour and with social licking. Horning showed a positive correlation with social licking only. Four groups of husbandry conditions that may be associated with the occurrence of social behaviour and of injuries were distinguished: i) herd management, with variables including problem solving management by the farmer, integration of new cows, and dealing with periparturient and oestrus cows; ii) human-animal relationship, with variables including ability to identify individual cows, frequency of brushing the cows, number of milkers, and frequency of personnel changes; iii) animal characteristics, with the variable of herd size; and iv) stable characteristics, with the variable of space per cow (m2). The relevance of the husbandry variables investigated here had been confirmed in a previous stepwise regression analysis (Menke 1996). The variables for herd management and human-animal relationship conditions correlated in a consistent way with the occurrence of agonistic behaviour and/or of injuries, while most of them also correlated in the opposite direction with the occurrence of social licking. Herd size correlated positively with agonistic behaviour, but negatively with social licking. Space per cow correlated negatively with agonistic behaviour and injuries. In more than 70 per cent of the herds investigated, the levels of agonistic behaviour and of skin injuries were low, implying that horned dairy cows can be kept with less risk than is often assumed. We argue that such risks strongly depend on management factors that can be improved.

Human factors (attitudes, personality traits, self-esteem, job satisfaction) strongly determine our behaviour towards animals, animal production and animal welfare. Recent studies have emphasised positive human contacts as indicators of a stockperson's positive attitude towards animals and towards animal welfare in general. Stockmanship can be improved by careful selection of people and/or by training. However, little is known of the biological basis of the effect of stock handling procedures on the welfare of animals. The animal's perception of the stockperson (based both on emotional responses and cognitive aspects such as anticipation, recognition and categorisation), and the existence of sensitive periods in an animal's life, need to be explored in more depth, especially under farm conditions. We need to consider the complexity of human behaviour (eg husbandry practices, balance between positive and negative interactions, predictability, controllability) and its effect on animal welfare from the animal's point of view throughout its whole life. This paper identifies the importance of positive human contacts for both animals and stockpeople, and highlights the challenge to maintain such positive contacts despite the trend in modern agriculture to increase the number of animals per stockperson. This requires better knowledge of animal genetics, socialisation to humans during sensitive periods, and management of the social group. We emphasise the ethical importance of the human-animal relationship in the context of farm animal welfare and productivity.

Arguably, grounding animal ethics in traditional moral theories such as utilitarianism or rights-based ethics is impoverished since they emphasise impartiality and abstractness in our ethical deliberations at the expense of giving proper weight to special relationships we have with other individuals. Here, I explore the human-animal bond as a starting point for animal ethics, and focus on the resulting moral implications of this bond on farm animal welfare. The human-animal bond revisits values inherent in the nature of animal husbandry and is also influenced by philosophical ethics of caring. Farmers or stockpersons who form close bonds with their animals make an implicit promise to discharge duties to their animal companions above and beyond respectful treatment as sentient beings. Scientific study suggests that interpersonal human-animal relationships may translate to better care and consideration for farmed animals, promoting both better animal welfare and on-farm productivity. Acknowledging the existence of human-animal bonds on the farm and encouraging farmers and animal handlers not to shy away from forming bonds with their animals is recommended. Farmers, stockpersons, and contract-farmers for agribusinesses should be given an ethical voice to lodge grievances about how farmed animals are treated and be encouraged to participate in discussions on farming practices and animal welfare standards. They should also be educated on gains made through scientific enquiry regarding the capacities and needs of animals as well as on welfare advances.

The aim of this study was to develop a set of tests to assess the reaction of laying hens towards humans in non-cage systems and to investigate the repeatability within and between days.

Based on a literature survey six tests were developed or modified, which were examined for practicability and adapted in a first phase. Reactions of hens were recorded directly or with a video camera. These included the reaction towards a stationary person: stockperson (SPs); experimenter: (SPe); a moving person: (moving through flock [MP]; approaching individual hens measuring avoidance distance [AD]) and a complex test including stationary and moving elements: (arm moving to touch hens [touch test] in the litter [Tl] and on the slatted area [Ts]). Six flocks of five farms were visited twice, one week apart. At each visit the six tests were performed during morning and afternoon hours. The order of the tests differed between farms.

Repeatability of flock reactions within as well as between days was high for SPs, AD and Tl. SPe and especially MP showed slightly reduced correlations. Touching hens at the droppings pit (Ts) was less repeatable than in the litter area (Tl).

To sum up, first experiences show that most tests can be practically used in groups of hens in non-cage systems and seem to have good repeatability.

Farmers' behaviour towards their animals could be improved by developing training programmes designed to decrease handling stress and improve animal welfare. This requires key preliminary work to collate farmers' beliefs concerning beef cattle and their knowledge of how to handle them easily. This paper reports the preliminary results of a survey conducted in 2004 among Limousin farmers. Fifty-five percent of the 300 French beef cattle farmers surveyed returned a questionnaire covering ease of handling, husbandry conditions, attitudes towards cattle, and behaviour during handling and husbandry practices. The results revealed that farmers' attitudes were generally positive. However, variability within each item indicated the potential for improvement. Temperament of heifers or cows is the first trait considered in decisions on culling an animal. Principal Component Analysis (PCA) showed a relationship between positive attitudes towards animals and towards contact with the animals. Attitudes towards negative behaviour (hitting, shouting) during handling are independent of attitudes towards animals. Most farmers underline human contact followed by quality of the facilities for improving ease of handling. Surprisingly, 28% of the farmers surveyed did not recognise the genetic traits as an important factor in ease of handling. Farmers seem open to improving handling, in particular through positive human contact. These results combined with existing scientific knowledge and additional observations of handling will be useful in defining future training programmes for improving the welfare of beef cattle.

In the present study we evaluated the influence of different sample sizes and different experimenters on the reliability of measures of avoidance distance (AD) at farm level. On 29 dairy farms the AD of 55-100% of the cows was assessed by two different experimenters (E1 and E2). For both experimenters the herd median of AD (ADME) and the percentage of animals that could be touched (Touch%) were calculated. The reliability between experimenters was assessed by Spearman rank correlation coefficients. To assess the influence of sample size on reliability of AD, the tested animals were randomly divided into two halves (H1 and H2), and ADME and Touch% were calculated for both halves and correlated with each other, with total ADME and total Touch%, and with the behaviour of the milkers. All measures of AD were highly correlated between experimenters (ADME rs = 0.86; Touch% rs = 0.81). On farms with a higher value for ADME, however, some discrepancy was found between experimenters in ADME and Touch%. Smaller sample size reduced the number of significant correlations with milkers’ behaviour. AD of H1 and H2 correlated only moderately (rs = 0.38-0.43). In sum, smaller sample size reduced reliability and validity. Between-observer reliability of AD was relatively high, but there may be some observer influence. Further investigations are necessary to optimise the measures.

Twenty-four primiparous pregnant pigs were randomly assigned to three handling treatments: Minimal, Positive and Negative. The pigs were moved individually to indoor concrete-floored partial stalls with neck-tethers, 2 days before handling commenced. Positive (stroking and patting on approach to an experimenter) and Negative (brief electric shock of < Is when failing to withdraw from the outstretched hand of an experimenter) handling was imposed for 3min day-1 and the amount of physical contact between handler and pig was recorded. The Minimal treatment group was subjected to routine husbandry practices only. After 3 weeks of the handling treatments and tether-housing, all pigs were catheterized under full surgical anaesthesia. The pigs were allowed 4 days of recovery before collecting the following data: daytime plasma Cortisol concentration profiles, behavioural responses to a human in an arena test, Cortisol responses to human proximity, Cortisol responses to an A CTH-challenge and immunological responses to an injected mitogen.

In the Positive treatment, the amount of physical contact between pig and handler increased during the course of the experiment, while the amount of physical contact did not change in the Negative treatment. There were no effects of treatment on behavioural responses in the arena test. The average daytime concentration of free plasma Cortisol was lower in the Positive treatment than in the Negative or Minimal treatments. The Positive treatment also showed lower total and free plasma Cortisol concentrations pre- and posthuman proximity when compared with the Negative treatment. No differences were found between treatments in total and free plasma Cortisol concentrations following an ACTH challenge. The immunological response was greater in the Positive treatment compared with the Negative treatment and tended to be greater when compared with the Minimal treatment.

It was concluded that the nature of the human-animal relationship affected the physiological stress responses of pregnant pigs to tether-housing. Indications are that a positive human-animal relationship would obviate some of the negative effects of being kept in tether-stalls by lowering the basal cortisol concentration and by increasing immunological responsiveness.

Feasibility and validity of protocols used to assess welfare were evaluated in two fattening rooms in twenty farms, chosen according to the group size, pen shape, floor and space per animal. The two rooms contained animals at the beginning or at the end of the fattening period, respectively. Behaviour was recorded either through direct observations of the pens (3 times per minute, at 5 min intervals), 15 minutes after entering the room (B1) or after the removal of an object given at the end of the visit (B3). The third protocol consisted of a 2 minute observation inside the pen (B2). To evaluate the human-animal interaction, the time to adapt to the presence of the operator in the corridor (HA1) was measured, as well as the reaction of the group when the operator entered the pen (HA2) or walked slowly through the pen (HA3), the time taken by the first five pigs to approach the operator (HA4) and the reaction of the animals when the operator tried to catch an ear (HA5). Lesion scoring was carried out inside the pen on a sample of 60 individual fatteners or at pen level on most of the pigs from the corridor. The occurrence of the main active behaviours is assessed similarly over time by B1 and B3. Behavioural observations are then possible in an on-farm welfare assessment. Lesion scoring from the corridor tends to under estimate the number of lesions (scratches, tail wounds). The HA3 test appears to be the best one to evaluate the relationship towards humans but has to be validated.

This pilot study investigates dairy heifers' perception of ‘positive treatment’ by a human (stroking and brushing) through a test of appetitive motivation. The hypothesis was that positive treatment by a human results in heifers pursuing a human to seek further positive treatment. Thirty-seven dairy heifers were assigned to either minimal human contact or positive treatment during rearing for five minutes per week, for a total of four hours, between ages six to 24 months. Six months after treatment ceased, the heifers were tested in a suite of four sequential tests, conducted while free ranging in their home pen with a group of familiar conspecifics. The tests explored whether dairy heifers that received positive treatment had: 1) a lower flight distance than controls; 2) accepted initial positive treatment during the test; and (for those who voluntarily re-approached and interacted with the human after the human had retreated) whether this was due to 3) curiosity; or 4) motivation for further positive treatment. Positive treatment heifers had a lower flight distance in component 1 of the test and more of this group voluntarily approached the human compared to the control heifers. The positive treatment allowed more initial positive treatment (component 2) and sought further positive treatment in components 3 and 4. It is concluded that ‘positive’ treatment is rewarding for many heifers. It is suggested that positive treatment constitutes environmental enrichment of dairy cattle and can enhance cattle's quality of life and the human-animal relationship.

This study aims to investigate the relationship between human behaviour, buffalo behaviour and prevalence of oxytocin injection at milking. The research was carried out on 17 buffalo farms. On each farm the stockperson's behaviour toward the buffaloes and the buffaloes' behaviour were observed during one afternoon's milking. Stockperson's behaviour was observed from collection of the animals in the waiting area to exit from the milking parlour. The following variables were recorded: number of positive, neutral and negative interactions. The number of steps and kicks were recorded from the entrance to the milking parlour to the removal of cups whenever the stockperson was less than 0.5 m from the animal. The prevalence of oxytocin injection at milking was recorded on two separate occasions with a 5-month interval to obtain a measure of the long-term consistency of this variable. Significant correlations were found between stepping and kicking, stepping and prevalence of oxytocin injection, kicking and prevalence of oxytocin injection and stockperson positive interactions and kicking. These results indicate that stockperson behaviour is related to buffalo behaviour at milking and the latter to the use of oxytocin injections. In addition, prevalence of oxytocin injection proved to be highly reliable when re-tested five months later.

Artificial rearing involves removing piglets from their mother at seven days of age and feeding them milk replacer until weaning. Early-life rearing conditions can influence piglets’ mental development, as reflected by their emotional state and reactivity. This study compared the post-weaning emotional state and reactivity of pigs which were either sow-reared or artificially reared pre-weaning. Behavioural tests (startle test, novel object test, human-animal relationship test and open door test) were conducted one week post-weaning (weaner 1, 34 [± 0.6] days old), one week after movement to weaner 2 (69 [±1.2] days old) and to finisher (100 [± 1.3] days old) stages. Qualitative Behavioural Assessments (QBA) were conducted on the same days in weaner 2 and finisher stages. QBA descriptors were computed by PCA and all other data were analysed using linear models. Artificially reared pigs were less fearful of human contact in weaner 1 (45.1 [± 8.43] vs 81.3 [± 7.89]%) and finisher (25.8 [± 5.19] vs 45.7 [± 6.00]%) stages; but there was no difference in the other tests. Artificially reared pigs had a higher QBA score (more positive) than sow-reared pigs in weaner 2 (54.49 [± 10.102] vs 17.88 [± 9.94]) but not in finisher (70.71 [± 8.860] vs 52.76 [± 9.735]) stage. In conclusion, artificially reared pigs appeared to have a more positive emotional state transiently post-weaning and a lower fearfulness towards humans, which are likely mediated by their pre-weaning conditions. These data emphasise the need to consider the entire life of the animals to fully evaluate the long-term impacts of a rearing system.

In Organisation for Economic Co-operation and Development (OECD) countries, the number of pets and pet owners has been increasing in recent years. The experiences people have with pets might impact their relationships with animals in general and especially attitudes towards animal protection and use. However, research on the impact of pet ownership on values and attitudes towards animals is relatively scarce. We analyse associations of pet ownership with different values and attitudes towards animals. We derived seven attitude constructs towards animals from three different datasets using Principal Component Analyses. Data were collected using standardised online surveys with German residents (dataset 1 = 1,049 respondents; dataset 2 = 414 respondents; dataset 3 = 1,048 respondents). All three samples are non-probability quota samples. The seven attitudinal constructs represent values and attitudes towards animals ranging from general values and attitudes towards, eg animal protection, to more specific attitudes towards, eg eating animals. We analysed the relationship of pet ownership, sex, and age with these constructs using ANOVA. Our results show that effect sizes are small to medium. Pet ownership has the strongest association with more general values and attitudes towards animals, with pet owners being, eg more involved in animal protection and more in favour of awarding fundamental rights to animals. In contrast, we found that more specific attitudes, such as the evaluation of current pig farming systems or attitudes towards eating meat, were more related to sex than pet ownership. Our findings indicate that having pets relates to their owners’ attitudes towards animals, but that this association varies depending on the specificity of attitudes.

This study investigated whether short-time stroking of loose-housed dairy cows in the daily farm routine could improve the cow-human relationship and consequently decrease avoidance distances, and whether this effect was persistent. Thirty-one cows (from two different breeds: Holstein Friesian and German Red Pied) received either a treatment (STROKING; n = 15) or no treatment (CONTROL; n = 16). In the STROKING group, each animal was stroked during morning and evening milking by an unfamiliar individual (experimenter) for 3 min over a 5-day period (Treatment 1) and again, 4 weeks later, over a 3.5-day period (Treatment 2). CONTROL animals could observe the experimenter during milking. Before and after treatment, the experimenter recorded the avoidance distances of cows (distance of first withdrawal when approached from the front) at the feeding place (AVOIDfeed) and in the barn (AVOIDbarn). Prior to Treatment 1, CONTROL and STROKING animals did not differ in AVOIDfeed or in AVOIDbarn. After Treatment 1, AVOIDfeed was significantly lower in STROKING animals compared to CONTROL animals. With regard to AVOIDbarn, no significant difference was found between STROKING animals and CONTROL animals after Treatment 1. After 4 weeks, before Treatment 2, CONTROL and STROKING animals did not differ significantly anymore in AVOIDfeed. After Treatment 2, AVOIDfeed was again significantly lower in STROKING animals than in CONTROL animals. Also, in the barn, (AVOIDbarn), STROKING animals avoided the experimenter less than CONTROL animals after Treatment 2. In terms of within-group evolution of avoidance distances, AVOIDfeed of CONTROL animals did not decrease in the course of the two treatments. Only after Treatment 2 were avoidance distances at the feeding place of STROKING animals significantly lower than initial avoidance distances. AVOIDbarn of CONTROL animals decreased after Treatment 1 but did not decrease significantly after Treatment 2. AVOIDbarn of STROKING animals decreased significantly after Treatment 1 and again after Treatment 2. It is suggested that short-time stroking during milking can affect the responses of cows to humans positively, although our results question the amount of contact necessary: even more contact might be required for lasting effects.

Positive stockperson attitudes to his or her animals is associated with a positive behavioural response in the animals and in other indicators assumed to reflect a high level of welfare as well as increased productivity, eg in milk yield. Conversely, negative attitudes have been found to have the opposite effect. However, so far, no attempt has been made to link the attitudes of stockpersons to outcomes of comprehensive protocols assessing animal welfare at farm level. In the study reported here, attitudes of Danish dairy farmers are compared with the on-farm welfare of dairy cows as assessed by the Welfare Quality ® (WQ) protocol. In 35 dairy herds the welfare was assessed, and the farmers filled in a self-report questionnaire on their attitudes to dairy cows and how they should be handled. The farmers on the farms with the lowest total welfare score could, according to the self-report questionnaire, be characterised as those with a negative attitude to the handling of cows (eg less strongly disliked to kick a cow or use a stick, when necessary). As expected, farmer behavioural attitudes regarding different situations correlated: for example, farmers who liked more to work with and have positive interactions with the cows also agreed more on patient handling and the importance of regular positive contact. Furthermore, farms where farmers gave cows a positive characteristic were found to score highly on the WQ principle ‘Appropriate behaviour’.

The aim of this study was to investigate the human-animal relationship on dairy goat farms, in particular associations between stockpeople's attitudes towards goats (Capra hircus) and actual behaviour when handling goats and making decisions. Data were collected on 45 Austrian and German dairy goat farms. Attitude questionnaires of 119 stockpeople (58 female, 61 male) were analysed and 14 attitude components were extracted by five Principal Component Analyses (PCA) regarding general attitudes about goats and human-animal relationship, behavioural attitudes about specific human-goat interactions and interactions during milking, and affective attitudes. To investigate associations between stockpeople's attitudes and their subsequent behaviour, we calculated linear and logistic regression analysis on their behaviour during milking (n = 53 milkers) and on management decisions (n = 45 farms). Several attitude components were predictors of behaviour during milking. The attitude ‘Needs of goats’ was included in all models: the higher stock-people scored on ‘Needs of goats’, the more positive interactions they showed and the less likely they were to use negative interactions. Gender influenced five attitude components: females showing greater agreement than males on positive general and affective attitudes, eg ‘Needs of goats.’ Regarding management, the more strongly decision-makers disagreed on using negative interactions during milking, the better was their farm's housing and management. To conclude, these results highlight the importance of the stock-people's attitudes, not only for the interactions with their animals, but also for their decisions related to management and housing. Our results indicate opportunities for improvement of animal welfare by training specifically targeting stockpeople's attitudes.

Human approach tests are generally accepted as valid measures of the human-animal relationship and hence are widely included in on-farm welfare assessment protocols. Most measures of avoidance response to human approach in production animals have been developed and tested under experimental conditions rather than on commercial farms, thereby making the results less relevant for operational on-farm animal welfare assessment. By contrast, the current study was conducted on calves in their home pens. On 110 Norwegian dairy farms, 548 group-housed calves (aged 22-288 days) were tested individually for their behavioural response to an unfamiliar human approach by a single test person. To conduct the test, the respective calf manager administered concentrates to the manger, followed by the test person who approached each animal in turn in a standardised manner. The avoidance response of the individual calf was categorised as 0 to 5 (maximal to no avoidance) in reaction to an attempted approach and head touch by the test person. The statistical analyses showed that heifer calves were more avoidant compared to bull calves, as were younger bulls compared to older bulls, and that overall avoidance increased in calves that were not tested first.

Although the relationship between farm animals and humans has strong implications for animal welfare and productivity, there have been few experimental studies on the influence of gentle interactions in group-housed calves. In the present study, Austrian Simmental calves were housed in groups of four under standard management conditions. Fourteen calves experienced 40 min of additional gentle interactions in the form of stroking and gentle talking during the first four weeks of life, whereas the remaining eleven calves did not. The animals’ fear of humans was measured by avoidance distance tests on 33 and 76 days of age and by an arena test that comprised three phases — isolation, presence of a human, isolation — at 34 days of age. The very low avoidance distances did not differ significantly between the groups. In the arena test, there was less behaviour indicative of stress in the presence of the experimenter compared with the isolation phases. Heart-rate measurements showed a corresponding pattern. Control calves showed more tail-flicking than stroked calves and had higher concentrations of salivary cortisol before and after the test. There were no other significant differences between the groups. The minor number of behavioural differences may result from the control animals’ good relationship with humans, ie there is a ceiling effect. If the general contact between stockpeople and calves is gentle and negative experiences are minimised, it is possible to achieve a good calf-human relationship without additional efforts.

Empathy and anthropomorphism, well-established components of the human-pet relationship, are considered to be especially related to pet animal welfare. We have developed a systematic and standardised approach to explore the effect of the human-pet relationship on animal welfare, focusing on pet birds. Based on a data set measuring the owner-bird relationship as well as bird welfare, cluster analysis and multivariate regressions were used to identify empirical types of bird owners and analyse their effect on bird welfare. Five empirical types of bird owners were identified based on the multi-dimensional relationship between owner and bird which consisted of: (i) the closeness-appreciating anthropomorphising owner; (ii) the closeness-appreciating socially supported owner; (iii) the anthropomorphising socially supported owner; (iv) the inattentive owner; and (v) the distance-appreciating owner. These differed in terms of the owner's tendency to anthropomorphism, the social support the bird provides to the owner, the empathy, attentiveness and respect of the owner towards the bird, and the bird's relationship with the owner. In particular, the inattentive type, but also both anthropomorphising types, raised serious questions as to the well-being of the pet bird. We found significant correlations to bird behaviour, such as imprinting aspects, aggressiveness towards humans, conspecifics and other pet animals, as well as behavioural disorders, such as locomotor stereotypies, courtship behaviour towards humans and feather-plucking.

Pain is an indicator of welfare status in livestock, and attitudes play a key role in the assessment and treatment of pain in animals. Veterinarians’ and dairy producers’ perceptions of cattle pain are affected by gender, age and work experience. The aim of this paper was to study beef producers’ attitudes regarding disbudding as well as the painfulness of certain cattle diseases. A questionnaire was sent out to 1,000 Finnish beef producers and the response rate was 44%, representing 19% of all Finnish beef producers. Producers graded their attitudes on a five-point Likert scale and perception about pain on an eleven-point numerical scale. Factor analysis was used and four factors were established. These factors described producers’ assessment of disbudding-related pain, their sensitivity to pain in cattle, their willingness to self-medicate disbudded calves and their perceived importance of horns. Factor scores were tested for differences between genders and the use of disbudding on farms with Mann Whitney U-tests. Kruskal-Wallis tests were used to assess differences among producers’ age, work experience and herd size. Female beef producers assessed animal pain higher than male beef producers. Older and more experienced beef producers showed more positive attitudes towards cattle with horns than younger or less-experienced ones. Older beef producers were more sensitive to cattle pain than younger producers and beef producers with a smaller herd size took disbudding pain more seriously and were more sensitive to cattle pain than the producers with larger herds. Producers who did not use disbudding valued horns more than producers using disbudding.