I dont know about fluffing up when it is warm.... but mine will do this when they are chilly.... but who ever said it is in the eyes had it right on..... If they are eating and drinking normally and their eyes are clear, aleart and open, and they are moving around normally then they are good... I would still keep a close eye on it... maybe put a heat lamp out, even if it is warmish.....mine will get under the lamp when it is 80 out! they seem to like heat more than chickens or water foul