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Roy Lewis


Stories by Roy Lewis

calf
Livestock Management

Beef sector needs more research into protozoal disease

It’d be nice if research could eventually be done to allow on-label use of toltrazuril

Reduced federal research capacity may mean more livestock health products have to go extra-label through veterinarians, which puts a lot of pressure on them, veterinarian Roy Lewis writes.
February 26, 2026

Cattle grazing in a pasture with the sun setting in the distance just outside the frame.
Livestock Management

How we think of parasite control in cattle is changing

We need to all think more about timing for both lice and internal worms so that control products can do the best job possible.
November 27, 2025

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