I don't know what to do. He was perfectly fine last night when I put them away, but this morning there is something wrong. I have checked for wounds and made sure nothing was broken(that I could tell). He is keeping his head close to his body and any time he tries to stretch out his neck he immediately brings it back to his body. His crop(?) looks larger than the girls, almost like something is in there, I have gently felt around and felt maybe a small lump, but I am not sure. He walks, hops, and swims okay, except for not diving. He tried to groom but is having problems. I made sure to fill a pan with water because he can't seem to reach into the buckets. I did notice that his bill/nares(?) were kinda crusty from food and not clean like the girls. There seems to be no discharge or build up of discharge, was not impressed at first when I helped clean him up but then calmed down. I have included many pictures of him, standing by the gray pan in the back, with his sisters to try and show the difference of behavior and body language. Any help or suggestions would be greatly appreciated!!