HI there, I have a mother hen who is raising nine chicks, she hatched fertile eggs from a friend as I don't have a rooster. One of the chicks is eating and drinking but two days ago it started gulping air or looks like it keeps swallowing. It is doing ok otherwise. What could be wrong? They have chick starter feed and our with the hen. Please advise if you have seen this or what i can do if something is stuck in its crop?????