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 ...

White wormers (benzimidazoles) work well at killing adults in the GI tract, he adds. The two subclasses of the macrocyclic ...

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 ...