The immune response by goats is complex and requires exposure to a sufficient level of infective worm larvae, and is not as well developed as with other livestock. >> Read more.
Barber's pole worms lay thousands of eggs per day, compared to scour worms that only lay a few hundred per day. This higher egg output per worm means a WormTest (worm egg count) in the stock can be much higher for barber's pole worm before drenching is required.
Worm larvae withstand frosts
Only treat if your sheep have visible lice or there is a high probability of lice