I am brand new to having chickens. We got them 1.5 weeks ago and kept them cooped up for the first week to get them used to their new home. It is a small coop (a run about 4x5 feet, and a coop on the second floor). On Saturday, we opened the door, clipped their wings, and they started ranging in the yard (which is quite large). On Monday, I noticed that the smallest of the three chickens didn't come down out of the coop. After a couple of hours, I coaxed her out with sugar water. That day, in particular, she was lethargic, sleepy, and I noticed blood in poop (I assume it is hers). She has been better since Monday (it is now Thursday); she is still sleepier than the others (closes her eyes quite a bit), but she gets up and out of the coop with the other girls and spends the day outside from about 7 am- 7:30 pm. However, I still see blood in the droppings. I've been taking the droppings out of the coop every day (to ensure they aren't getting eaten or picked at). I've asked around and here is what people have suggested might be wrong: traumatized from her new life (clipped wings, etc.) and is in shock; cocci; worms; Marek's disease (unlikely); or it could be nothing. I wouldn't be worried if it weren't for the blood in the stool. I haven't separated her and none of the birds are laying yet (will lay starting in mid to late June). I ordered Sulmet and I switched from Organic grower feed to medicated grower feed on Monday. I would prefer not to treat if I don't have to, but I don't want sick chickens, either.