I've got a 9 week old pullet that has been acting very tired/sleepy and just generally blah. She seems to stay mostly by herself. Her eyes and nose are clear. She's been eating and drinking, although I do not know if her appetite has declined from the norm. Today she had a very light yellow, watery poo-no solids/no white. This is the first poo i've seen like that. It could be the only one, or not- I just don't know. I know it's not a normal poo, but is it one of the normal 'other types' of poo? (If that made any sense.) I was able to hold and cuddle her, which is not normal behavior for her. She did not struggle, but rather seemed to enjoy the attention. She was very relaxed. She also seems to be breathing heavy. I cannot hear her breath, and her beak remains closed, so she's not stuffed up. I can see her chest move a little more than the other birds do. I noticed she seemed 'off' yesterday, but she is the lowest in the pecking order, so i'm unsure as to whether she is just keeping to herself for that reason or if she's sick. Here she is: I'll be separating her from the flock and I'll try and give her some yogurt. I don't have apple cider vinegar at the moment, but will get some tomorrow. I've searched for info here and went through dlhunicorn's links on 'poo-ology', but nothing really seems right. She is not overly 'dirty' - white birds just can't stay clean, can they? And she looks more alert than what she seems in the picture. She is steady on her feet, when she is on her feet. No signs of mites or lice or sores. On edit: In reading another post, someone mentioned inadequate ventilation could cause respritory distress. There's plenty of ventilation in the coop, but it is new (untreated) wood- could this be a contributing factor? And another thought: Do chickens suffer from allergies?