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Large scale field trials of a soluble glass zinc, cobalt and selenium bolus given to sheep

Published online by Cambridge University Press:  05 November 2021

N.R. Kendall ,
A.M. Mackenzie ,
D.V. Illingworth ,
D.W. Jackson ,
P.M. Driver ,
I.M. Gill ,
J.K. Miller  and
S.B. Telfer
N.R. Kendall
Affiliation:
Department of Animal Physiology and Nutrition, University of Leeds, Leeds LS2 9JT, UK
A.M. Mackenzie
Affiliation:
Harper Adams Agricultural College, Newport, Shropshire TF10 8NB, UK
D.V. Illingworth
Affiliation:
Department of Animal Physiology and Nutrition, University of Leeds, Leeds LS2 9JT, UK
D.W. Jackson
Affiliation:
Department of Animal Physiology and Nutrition, University of Leeds, Leeds LS2 9JT, UK
P.M. Driver
Affiliation:
Department of Animal Physiology and Nutrition, University of Leeds, Leeds LS2 9JT, UK
I.M. Gill
Affiliation:
Thrums Veterinary Group, 1 Morrison Street, Kirriemuir, Angus DD8 5DB, UK
J.K. Miller
Affiliation:
Biotrix, 4 Northgate, Peebles EH45 8RE, UK
S.B. Telfer
Affiliation:
Department of Animal Physiology and Nutrition, University of Leeds, Leeds LS2 9JT, UK
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Extract

Many sheep in the United Kingdom are grazed on pastures deficient in cobalt and selenium. Proprietary products for selenium and cobalt supplementation often contain copper, which in certain breeds can induce copper toxicity. A soluble glass bolus has been manufactured to supply long term sustained release of cobalt and selenium similar to the commercially available Cosecure, but with the copper content being replaced by zinc. Sub clinical zinc deficiency has been suggested to be involved in disease conditions such as broken mouth periodontitis, footrot and mastitis. Therefore a long term continuous supply of zinc may be beneficial in these situations. This trial was designed to examine the effect of administering a zinc, cobalt and selenium soluble glass bolus on trace element status of over-wintered ewe lambs.

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Programme
Information
Proceedings of the British Society of Animal Science , Volume 1998 , 1998 , pp. 209
Copyright
Copyright © The British Society of Animal Science 1998

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References

Kendall, N.R., Mackenzie, A.M. and Telfer, S.B. (1997). In Trace Elements in Man and Animals-9: Proceedings of the Ninth International Symposium on Trace Elements in Man and Animals. Edited by Fischer, P.W.F., L'Abbé, M.R., Cockell, K.A. and Gibson, R.S. NRC Research Press, Ottawa, Canada, pp. 303–305 Google Scholar