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Use of prolonged-release bovine somatotropin for milk production in British Friesian dairy cows. 2. Effect on health and reproduction in two consecutive lactations of treatment

Published online by Cambridge University Press:  27 March 2009

R. F. Weller ,
R. H. Phipps ,
N. Craven  and
C. J. Peel
R. F. Weller
Affiliation:
AFRC Institute for Grassland and Animal Production, Church Lane, Shinfield, Reading RG2 9AQ, UK
R. H. Phipps
Affiliation:
AFRC Institute for Grassland and Animal Production, Church Lane, Shinfield, Reading RG2 9AQ, UK
N. Craven
Affiliation:
AFRC Institute for Grassland and Animal Production, Church Lane, Shinfield, Reading RG2 9AQ, UK
C. J. Peel
Affiliation:
AFRC Institute for Grassland and Animal Production, Church Lane, Shinfield, Reading RG2 9AQ, UK
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Summary

There were 45 cows in each of the control and treated groups in the first lactation of the study and, of these, 30 cows in each group received the same treatment for a second lactation. The study was conducted during the winters of 1985/86 and 1986/87. Injections of either bovine somatotropin (BST) or a placebo were started at day 60±3 post partum and repeated at fortnightly intervals for the remainder of each lactation.

Body temperature and heart and respiration rates were unaffected by the administration of BST. Minor abnormalities were noted in individual animals in both groups, hygromata of the tarsus or carpus being most common. However, no health problems could be related to treatment. There was no evidence that the administration of BST increased the incidence of metabolic disorders. Ketosis was not observed in either lactation.

Type
Animals
Information
The Journal of Agricultural Science , Volume 115 , Issue 1 , August 1990 , pp. 105 - 112
Copyright
Copyright © Cambridge University Press 1990

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References

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