one of my chicks is fluffed up and not as happy as yesterday. I am thinking cocci, found a patch of runny, bloody stool. there are 3 other sibs with it and it's mom. should I isolate baby? will the others get it? or are some birds just more susceptible then others? (weaker) should I sprinkle DE in the run (food grade stuff) It's my favorite baby. don't want to lose it. I'm giving yogurt, cayenne, DE, vit. E. will that help? or are meds required at this point?