I have a blue laced red wyandotte chick being raised with 4 siblings by my silkie hen. Today when I went to give them a little lettuce to try I noticed this chick was a bit puffed up and it had its tail pointed down. It seems healthy, it can walk and flap, vent seems clear but it just seems off. I couldn't feel any food in its crop and I don't think it's really eaten at all, when I went to give the chicks and mother some lettuce all the chicks went crazy but this one was just standing pooffy and tail down. After inspectioning it and putting it down it went under the mother hens food stand then tried to get under her. The chick didn't feel cold and it's big enough to not need it's moms warmth all the time. So I'm wondering what could be wrong with the chick and if there is anything I need to do to help it?