Glad to hear the chickens are improving. Corid is not really a med. It's a vitamin B-1 blocker. As far as I know, all strains of coccidia feed on thiamine so Corid should be effective.
Different strains of coccidia can, however, produce different symptoms. Some cause inflammation of the intestinal lining producing bleeding while other strains do not. Also, the sheer numbers of coccidia in the intestines can produce harsher symptoms or less according to the load.
If I were in your situation, I would try ordering this med. https://www.jedds.com/shop/trimethoprinsulfa-100-g-medpet/ I haven't heard that Ohio is a state that prohibits online pharmacies from shipping to the customer. Give it a try and see what happens. This med is both an antibiotic and coccidiostat in one, specially for tough cases.
Different strains of coccidia can, however, produce different symptoms. Some cause inflammation of the intestinal lining producing bleeding while other strains do not. Also, the sheer numbers of coccidia in the intestines can produce harsher symptoms or less according to the load.
If I were in your situation, I would try ordering this med. https://www.jedds.com/shop/trimethoprinsulfa-100-g-medpet/ I haven't heard that Ohio is a state that prohibits online pharmacies from shipping to the customer. Give it a try and see what happens. This med is both an antibiotic and coccidiostat in one, specially for tough cases.