Heat stress may trigger lameness

Did your herd suffer more claw horn lesions this past summer? It may be associated with heat stress.

During periods of heat stress, cows spend an extra 2.5 hours standing per day, according to research from the University of Wisconsin’s School of Veterinary Medicine. “This increase in standing, combined with an increased risk of SARA (subacute ruminal acidosis), is probably the explanation for the increase in claw horn lesions seen in U.S. dairy herds in the late summer,” says Nigel Cook, veterinarian at the University of Wisconsin.

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