and pastures can only be infected by cows carrying adult stomach worms. Worms that are resistant to a dewormer (less than 90% are killed by the treatment) survive and lay eggs that are deposited ...

Over the course of the grazing season, an extended-release injectable dewormer can do just that — giving cattle the ability to use feed more efficiently and ultimately gain more weight ...

Bill to make ivermectin available OTC without a prescription advances in state Legislature. Supporters claim it might cure ...