I've got this pullet I just found in our coop - she's 5 months old, we've never had any sickness before - she's sitting down, not moving much. None of my pullets have started laying eggs yet and I checked to see if she might be egg-bound (her comb is still light pink) but I don't feel anything like an egg coming out. I do have a broad spectrum antibiotic drinking solution for all birds ( 4 fl ounces) sulfadimethoxine 15 mg. per ounce. She also does not have the "runs". I've isolated her. Her crop doesn't seem very full. How much should I give her? Any thoughts? Everyone else is just fine, running around as usual.