I put my almost 3 week old chicks in their coop today (just for the day) because it's about 90 degrees here in massachusetts. i just checked on them and most are breathing with their beaks open and their throats moving up and down. i hope i explained that in a way you can picture. is this normal? are they stressed? why would they be stressed when it's so warm out and they have a larger coop to explore? should i bring them back inside?