I have a group of lambs that were doing great until about 2 weeks ago when weight started dropping off them. Literally withering away despite them having clean back ends. PM’ed 2 of them and they were full of heamonchus so I’ve wormed them for it in the hope they turn around quickly. Should I be drenching the ewes for it as well? They’re not with the lambs, weaned a while ago, but do I do them regardless?