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File photo of a roundworm larva. (Dotana/iStock/Getty Images)
Livestock

Health Canada warns people not to take livestock dewormers

No evidence that drug is effective against COVID-19

By ,
“Concerning reports” of people in Canada seeking out veterinary-grade dewormers for personal use have led Health Canada to formally advise against doing so. News reports in Western Canada in the past week have described increased demand from non-farming consumers for veterinary-grade ivermectin, whether at livestock supply retailers or online. While ivermectin is an antiparasitic drug […] Read more
This diagram put together by Doug Colwell a research scientist at the Lethbridge Research Centre, shows the zones on an animal were lice are most likely to concentrate and be visible. Colwell is internationally recognized for his studies on the interactions between insect parasites and their animal hosts.
Cattleman’s Corner, Livestock

Late fall better for lice and parasite control in cattle

Animal Health with Roy Lewis: A two-pronged approach to deal with internal and external pests

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There has been lots of talk and questions from producers and large-animal veterinarians regarding the strategy needed for more effective lice and internal parasite control. I the last couple of years there has been a large increase in the incidence of lice in Western Canada. Producers are searching to find ways to control lice that […] Read more
Some rubbing and licking is part of the natural grooming process, but cattle producers should be concerned if there is excess skin damage or hair loss.
Cattleman’s Corner, Livestock

A certain amount of scratching in cattle is natural

Animal Health: Most delousing products will do the job, but there are exceptions

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With the advent of the reliable pour-on and injectable endectocides, scratching from lice or mange is rare unless a fall treatment was not done or we have biting lice or mange about. Veterinarians are sometimes called on to investigate apparent breaks in these products’ efficacies. I know we have observed a lot about cattle’s scratching behaviour which we […] Read more
cattle chute
Cattleman’s Corner

Assess herd in March for lice control needs

Don’t mix treated and untreated cattle, and apply products at the proper dosage and at the proper timing

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Lice are a common winter problem in cattle, especially in northern climates with cold weather and short winter days. Their life cycle speeds up and numbers increase dramatically when weather is cold and they have long winter hair to hide in. Doug Colwell, a livestock parasitologist with Agriculture Canada in Lethbridge, Alta., says sucking and […] Read more

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