My week old chick has been panting since it was about 2 days old. It is smaller than all the others and distances itself. It doesn't have weepy eyes or nose and drinks and eats by itself but less than the others. One day i found that it had a bit of a pooey bum but it hasn't had one since them. It looks really sad and has noticeably less energy than the rest of the chicks. Is my chick sick?? What can I do to help it? Please help!!