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Development of the mobile bag technique to study the degradation dynamics of forage feed constituents in the whole digestive tract of equids

Published online by Cambridge University Press:  05 November 2021

J. J. Hyslop ,
A. L. Tomlinson ,
A. Bayley  and
D. Cuddeford
J. J. Hyslop
Affiliation:
University of Edinburgh, Dept of Vet Clinical Studies, Easter Bush, Roslin, Midlothian EH25 9RG, UK
A. L. Tomlinson
Affiliation:
University of Edinburgh, Dept of Vet Clinical Studies, Easter Bush, Roslin, Midlothian EH25 9RG, UK
A. Bayley
Affiliation:
University of Edinburgh, Dept of Vet Clinical Studies, Easter Bush, Roslin, Midlothian EH25 9RG, UK
D. Cuddeford
Affiliation:
University of Edinburgh, Dept of Vet Clinical Studies, Easter Bush, Roslin, Midlothian EH25 9RG, UK
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Extract

The mobile bag technique (MBT) has recently been used to provide single time point estimates of feed digestibility in both the small intestine (Macheboeuf et al 1996) and the whole tract of equids (Hyslop and Cuddeford 1996). This experiment develops the use of the MBT as a method to study the dynamics of the digestive process over time in the whole tract of ponies.

Three mature Welsh-cross pony geldings (270 kg LW) were offered ad libitum threshed grass hay plus minerals. Two sizes of mobile bag (6 x 1 cm Ø - large & 4 x 1 cm Ø - small) made from monofilament polyester with a 41 μrn pore size containing either 200 or 130 mg of feed respectively were used. Bags containing either dehydrated alfalfa (DHA), threshed grass hay (THAY), dehydrated grass (DHG) or grass hay (HAY) were introduced directly into the stomach via a naso-gastric tube in batches of 22 (14 large and 8 small). Batches of bags were administered twice daily on days 1, 2, 8 and 9 of a 14 day period according to an incomplete latin square experimental design giving a total of 44 bags per feed in each pony. On recovery in the faeces, dry matter (DM) disappearances were calculated for each bag.

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Proceedings of the British Society of Animal Science , Volume 1998 , 1998 , pp. 129
Copyright
Copyright © The British Society of Animal Science 1998

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References

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