I've lost a few chicks to what i'm assuming is cocci (fluffed feathers, a few with bloody stool, very depressed). I started giving liquid corid, 9.5ml/gallon in their water. this is day 3 and I lost 2 3wk old chicks this morning and another 1 1/2 wk old looks depressed. is this normal? anything else I can do? from what I've read in various threads that's the right dosage... hate losing these chicks!