Internal parasites of sheep

2 Volume set v. 1. Technical handbook v. 2. Farmers handbook.Drenching sheep when they look as though they need it is not a satisfactory way to control internal parasites. This short handbook is written for farmers. It describes parasitic worms and their control in sheep. The "message" is that effective drenching programmes have to be well planned and the best parasite control programmes do not rely on drenches alone. When designing a parasite control programme for a farm it is wise to check the plans with a vet or farm advisor