I cured a rooster with wry neck that started with a head injury. 2 things you can do. Castor oil massages on the neck, and DMSO applications. Both relieve inflamation and act as an analgesic. My guy was perfectly normal within 2 weeks doing that. A half of a baby aspirin won't hurt either.Oh that would be disheartening. Sorry to hear that! Hopefully later hatches were better.
I have the little wry neck in the house now so I can keep an eye on it and give vitamins. If it recovers, I have a feeling it’ll end up being a little cockerel because I’m going to get so attached lol.