Huh, I never caught that. I had been using sulmet and albon interchangeably, I didn't catch the little "di" in the albon. Actually, I have switched to toltrazuril, it works really well and I only need to dose for two days plus it takes care of all of the weirdo things like tricho and crypto and cyclo.
But I digress. Then I change my opinion and say, if the sulmet doesn't work, try some albon. Your vet should have it, we use it for kittens and puppies with coccidiosis. I still disagree with using amprolium for TREATMENT. I believe it should be used for chicks to help them build up resistance and then after that if they come down with a case of coccidia, use a coccidiocide. But that's just my opinion.