I have seven 2 1/2 week old Bantam Ameraucanas. I'm afraid one of them is sick. She looks to be cold, fluffed up, and very close to herself, resembling when a bird is getting ready to go to sleep. She is not as alert as the others, but is eating, drinking, and being social. Her stool is normal with cecal stool here or there. She appeared to be perfectly healthy until late last night. The brooder is currently at 86 degrees F. I'm currently switching them over from a non-medicated feed to a medicated feed, per suggestion from the friend that I got them from (he gave me the eggs from his Bantam Ameraucanas, said to switch them over from feeds when they hit 2 weeks because his normally got sick from the medicated feed if it was given to them before 2 weeks). Does anyone have any ideas what could be wrong with this chick? I suspect a cold, but maybe something more serious?