I have several chicks I got from Ideal in April (hatch date of 4/5/11) and 6 from Rural King, 6 from TSC. They were all doing great up until last week or the week before. They have diarrhea, are slowly wasting, and stand hunched. Those are the only symptoms, and I've been treating for Cocci since Sunday. Shouldn't they be getting better? Some seem to have pulled through, or were never sick, while others are getting sicker and dying. This is not affecting my older birds (8 mos.-2 years) at all. Should I be treating for something else, or switch to Sulmet? (I've been using Corid, 1 tsp. per gallon of water no treats or ACV during treatment.) My only Black Langshan is dying right now, and I'm going to lose my only Butternut and Buckeye-----I can tell by how hunched and inactive they are this morning.