I have a black polish rooster that has crook neck. It started when he was about 6 weeks old. At first he could not hold his head up it would swing down. I have been giving him polivsoil vitamins and vitamin E He is now 18 weeks old. I had to put him in a separate pen as the others would knock him around and I would find him laying on the ground unable to get up. He is doing much better now. He is able to hold his head up but it is still crooked. My son built him a special feeding dish it stands about 7-8 inch high This way he doesnt have to bend down to eat. He is not alone as we put a female black polish in with him. He comes to me when I open the door. He knows that when he can't get his head up I will help him and he doesn't freak when I pick himup to medicate him. He has become one of my favorites as I spend alot of time with him. I don't know if he will ever get to return to the main coop but if he can't we will build him a small one of his own.