I have a five week old buff orpington who has started sitting and walking looking puffy - don't know how else to describe it. She is eating and drinking normally and will get up and come to me when I go into the coop but she stays puffy. I've watched her through the window and see that she sits by herself all puffed up. She likes to sit in my lap and when she does, the poofyness goes away. It's almost like she is cold. I noticed this morning that her feet seem cold compared to the others. I also noticed a bit of dark, runny poop but can't say it came from her, she is one of seven chicks. The others are acting normal. Today is the second day of this behavior. Could she be sick or is it possible that she is cold? I thought about turning the heat lamp back on but it is in the high 80s so think that might be too much heat. I can't find any reference to this type of problem and don't know what to do for her. She is such a sweet, lovable little thing and I don't like to think there might be something wrong. Has anyone run across a chick with this problem?I really need some advice.