So last night I cleaned a chick's butt due to some pasty butt problems. This afternoon I checked him again and found that he wasn't very active and couldn't poop. He does the squat and wing stretching but nothing comes out, then he immediately crouches down lower and starts to shake his whole body little. Other times he just virbrates his wings constantly.I checked his vent and it looked kind of swollen. He is eating and preening. What am I dealing with?