Help! I've got 10 chickens - one has coccidiosis and all were treated with sulmet for the prescribed days. Today was the first day of no treatment and there is cocci positive bloody stool. Not sure who's it is. I've read that Corid treats 9 versions of cocci while sulmet only treats 2. My vet doesn't know which kind of cocci we have. . . shall I just treat with Corid right now? Do I need a more sophisticated fecal test that reveals the actual type of parasite ? If it's a small bloody stool are we ok for the moment? Hens seem to be doing okay . . .???