Sorry, but search didn't turn up what I was looking for.
Just got my new horse about 10 days ago, came from VA to me in MA. First thing I notice, is he is covered with bot eggs. I haven't seen bot eggs on a horse since I was a kid (that was a long time ago). Ok, scrape eggs off and give Equimax, figuring I'll catch tapes at the same time. The same day I gave him the Equimax, I notice small red worms, alive, in his manure. Pretty sure they are small stongyles and now looking at him, he does have that kind of bloated worm belly shape.
So here is the question, when should I do a FEC, and do I have to wait the full 8 weeks to treat with Quest for encysted stongyles?
Do a FEC 10-14 days after and see if you find any ascarids. Given his obvious infestation, I'd want to know how his immune system is with those creatures. You shouldn't find any note-worthy strongyles, but if you do, ack!
If you don't want to do that (which is fine), then you should wait 12 weeks (always wait 4 weeks past the "expiration" date of the chemical, which is 8 weeks for ivermectin) to see if he should be dewormed again. If so, that puts you into the timeframe of a Spring deworming anyway, and that's the perfect time to use Quest Plus
______________________________ The CoTH CYA - please consult w/your veterinarian under any and all circumstances. - ET