Good morning,
I haven't ever used that wormer so I don't know anything about how it works. It must be very strong to have the effect you're describing. Have you ever thought about using only a half dose at a time?
No, I've never thought that....
I've read that under dosing is the quickest way to get worms immune to a wormer..??? Since, according to the vets I've talked too:), Anthelicide has already been overused, and worms immune to it (I don't agree with that because of the results I see in my horses), I've always just given each horse a whole tube, 1200 lb horse worth. My horses are not that big, but I know they always lose some, spit out, smear on lips etc.
Becky