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The efficacy of soluble glass boluses (cosecure) in grazing cattle

Published online by Cambridge University Press:  22 November 2017

P.M. Driver ,
G. Carlos ,
C. Eames  and
S.B. Telfer
P.M. Driver
Affiliation:
University of Leeds, LEEDS LS2 9JT
G. Carlos
Affiliation:
University of Leeds, LEEDS LS2 9JT
C. Eames
Affiliation:
University of Leeds, LEEDS LS2 9JT
S.B. Telfer
Affiliation:
University of Leeds, LEEDS LS2 9JT
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Extract

Two soluble glass boluses (COSECURE) per animal were given to 19 (+ bolus), silage fed, growing cattle (160-350 kg) on April 16th 1984 (day 0). After 29 days these and 11 untreated (control) animals, matched for weight, breed and sex, were turned out on to a copper deficient upland pasture. On day 153 (Sept. 21) all the cattle were moved to a lowland pasture until day 196, when they were housed and fed silage.

Blood samples and liveweights were taken on 5 occasions over 240 days. Copper status was assessed from plasma copper (Cu) and caeruloplasmin (CP) levels, and selenium status by erythrocyte glutathione peroxidase (GSHPx) activity.

Type
Ruminant Nutrition
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1986 , March 1986 , pp. 133
Copyright
Copyright © The British Society of Animal Production 1986

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References

Gallagher, J. & Cottrill, B. R. (1985). Vet. Record, 117, 468.Google Scholar