You could add support for his neck too. Have the sling sit higher up on his chest like. I've seen slings made from an old towel with holes cut in it and some binder clips.
You are keeping a very good eye on him. See how he does in it and go from there.
You should really look into a chicken sling. You could probably make it out of the basket you are already using. If he's wanting to stand it will help him a lot.
I wouldn’t. See how he does when you move that blanket. You can offer him water in a small glass or even a large spoon. They have to tip their head back to drink so if that’s a problem you can wet feed to give him. Or a scrambled egg. Even if you crush up the feed and make a thick milkshake for...
I would say he’s too warm. Maybe unbunch what you have surrounding him. If he can’t move himself like he wants to stand up or get his wings away from his body that could keep him overheated.
He could be stressed from the fight. If he can wiggle his toes and move some I wouldn’t think broken neck.
Will he eat and/or drink on his own?
Is he pooping?
Do you see or feel any injuries on his neck or elsewhere?
I would try to keep him warm and quiet for now.
@Eggcessive @casportpony...