My husband brought home a bunch of straight run chicks 2 weeks ago. One chick, just started acting very lethargic, won't move while I'm cleaning out the brooder unless I make it. Tonight I went to pick him up and he is HOT. I know chicks are warmer than humans, but he is hotter than the other chicks. I gave him a little soak and removed him from the rest of the flock. He has apple cider vinegar with the mother in his water and diatomaceous earth in his feed. Eyes are clear, no snot/sneezing, poop looks normal. I think he's a little bald, but other than that nothing is standing out. Any ideas what could be up with this guy?