not sure what is going on. He's a cuckoo maran, 16-18 weeks old. About a week ago my mother in law left me a note that he was acting funny, that is all it said. I checked on him and he was fine has been fine for days. She said he was stumbling around and couldn't keep his balance. Today he started stumbling again, but she didn't tell me. I went out a little wile ago and he's laying on the ground, kinda on his side with his legs sticking out and toes slightly curled. I pulled him out of the tractor and put him in a cage by himself with a pan of feed and water with apple cider vinegar in it. He is eating like crazy, he feels way too light to me like he's not getting enough to eat but he LOOKS huge. What could it be? Years ago when we had chickens I lost quite a few due to similar symptoms and we never knew what it was. Theirs was laying on their side, legs sticking out, paralysis of the legs and bluish/purple tinted combs, but they were probably 10-20 weeks older than these birds. We gave up for a few years after that and just got back into it again.