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Home » Authors » Jan K. Shearer

Jan K. Shearer

Professor & Extension Veterinarian / College of Veterinary Medicine / Iowa State University
Email Jan K. Shearer
Articles

ARTICLES

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Management of lame cows to improve animal welfare

As caretakers of dairy cattle, there’s a moral and ethical responsibility to reduce the suffering of lame cows. What can we do to manage lameness more effectively and improve animal welfare?
August 27, 2024
Jan K. Shearer

The welfare of a lame cow is affected in at least three ways: 1) it interferes with natural behaviors such as walking, lying down and interacting with herdmates; 2) it impairs normal function by reducing milk production and reproductive efficiency; and 3) the pain impacts the cow’s affective states of physical and mental well-being. What can we do to manage lameness more effectively and improve the welfare of cows that develop lameness?



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Digital dermatitis in cow-calf and feedlot cattle

July 24, 2015
P. J. Plummer and Jan K. Shearer
Our lameness research team at Iowa State University, comprised of faculty members Drs. Paul Plummer, Pat Gorden and Jan Shearer, and graduate students Drs. Adam Krull and John Coatney, has been actively studying digital dermatitis for the past six years.
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Preventing dystocia-related injury to cow and calf: Part II

January 24, 2015
Jan K. Shearer

Calving assistance errors are an important cause of dystocia-related injury resulting lameness in calves and cows, but by understanding the pelvic anatomy of both the cow and calf and what constitutes reasonable limits on extraction forces, many of these problems can be prevented.


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Preventing dystocia-related injury to cow and calf: Part I

December 24, 2014
Jan K. Shearer

People rarely think the way they manage a difficult birthing situation could determine the potential for injury to the cow and calf resulting in temporary or even permanent lameness. The delivery techniques applied have important implications for both the cow and calf.


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Lameness: Effects on performance, profit and welfare

June 7, 2011
Jan K. Shearer
There are few if any diseases in dairy cattle that impact the performance, profitability and welfare of animals more than lameness. Indeed, it justifies a conscious effort on the part of every dairy to invest whatever time or effort is needed to optimize foot health. Effects on performance Lame cows are less competitive at the feedbunk, when choosing a stall or when involved in aggressive interactions with other cows. Add to this studies that suggest pain alone is sufficient to decrease feed intake, and it’s not hard to see why milk yield is reduced by lameness.
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