I have a young roo who is about 6 weeks old the has a very very large crop. He is a BC Marans and I feed him med chicken starter still he gets to run around outside in his area with other chicks his age. When you pick him up you can push on it and what it reminds me of is a baloon, its not hard or anything. He acts ok I guess but when you watch him walk he leans forward and he can stand up straight but I dont know whats wrong with him. Please help if you can.