So we've been struggling with lots of parasites in a few of our sheep. The vet confirmed we're dealing with barber pole and tapeworms. We're following his protocol for treating them, which includes giving an iron injection. Well, we've lost three sheep now, all of which had the iron injection two days before they died. Seems weird, so we're curious to know if something is wrong with the iron we have or the dose we've been giving. Durvet Iron-100, 1 ml. Expiration date is 6-25. Bought it at tractor supply. Dosing just once a week per vet's instructions, along with a B12 injection. Any thoughts? We have two more young ewes struggling, one just got the iron yesterday the other hasn't had an iron injection as she's doing better not nearly as anemic.