The health of dairy cows given bovine somatotropin (bST) for one lactation was evaluated in 28 commercial herds located in four regions of the United States. Management was according to site practices. Cows were observed for health-related signs by farm personnel daily and by the herd veterinarian biweekly.

Overall, the results confirm the label directions for bST are adequate for safe use under field conditions. All clinical signs observed in this study occur normally in dairy herds and were managed in cows supplemented with bST.

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