I have a 5 to 5 1/2 week old chick that I don't think is growing to well s/he is much smaller that all the rest of my chicks that are the same age. Anyone have a clue to what it is or could be. I have remove s/he from the rest of the babies but should I put at least one more with s/he so s/he will not be lonely. There are so many in the main brooder that they keep stepping on s/he when all s/he wants is to rest. Thank you for any help.