Background: I hatched out my own chicks (second time doing it). I did not feed them medicated food. This is my first year with chickens. They are about 7 weeks old. One was quite a bit smaller than the other 5 chicks in the same hatch. She still has little baby feathers at the tip of her big feathers and her frame is small. She always kept her head tucked in since I can remember. I took them off heat at 6 weeks, according to an article I read- that was what I was supposed to do. Problems: I noticed the little one was moving slower. The next day after taking them off the heat- I found her in a little ball. She wasn't moving much so I put her under a gentle heat lamp. She wasn't eating, not drinking, and sleeping a lot. I gave her electrolytes and probiotics (sav-a-chick). Hours later she was opening her eyes a little more so I fried her up an egg. She ate it down over an hour or two. She started drinking a little more too (before I was giving it to her in an eye dropper. Her feces is very runny, smelly, and fairly bright green (green crumbles- food?)- with a lot of white thrown in. She is now not really wanting to drink again and only wants to eat eggs, no chick crumble. She is up and moving slowly now and for the last couple days. She does start to shiver as she falls asleep or stands too long- and breaths fairly heavily. I heard a click each time she would breath (not a rattle, just one click in and out). The Twist: So I'm treating her with Duramycin (as told by the feed mill). I'm strongly leaning towards her issue being coccidiosis though. She hasn't gotten better (no increased energy or eating chick starter) on duramycin in the last 24 hours of treatment. Her click is gone though. The twist is, I noticed one of her siblings is starting to tuck her head in. Then one of the chicks pooped and it was runny and smelly. They went again and the second time it was runny blood. Questions: Do you think I should treat for respiratory (duramycin) or coccidiosis (corid 9.6)? Should I treat for both? Isn't that a lot of medication? Will the little one ever get bigger? What should I feed her? Should I give them vitamins or other probiotics with the medicine or after? What should I do with the rest of my chickens, do I treat them too (these ones were in a pen inside the same coop)? Thank you so much for your help and any input!!