I have a young cockerel (I believe) who is 10 weeks old and was born blind in one eye the lady I got him from told me it was from the egg turner failing. I have noticed the last couple days he hasn't wanted to leave the coop and go outside with his other chickens and his tail has been down. He has been eating and drinking regularly but I'm concerned he may be feeling unwell. Anyone have any suggestions on what could be the problem or am I being paranoid?