Can't Open Mouth

[Bkaye]

If he’s eating and it’s taking a bit he may benefit from some private feedings for a little bit. He may have somehow got injured to where it’s bothering him.

 

[Wyorp Rock]

So one of my roosters has just come off from being sick. He's very interested in food now, (I had to hand feed him before as he wouldn't even touch it) but the problem is it seems he can't open his mouth to eat. I've only seen him drink once on his own, but when I bring him food he'll get really excited and get his face really close to it and move his face down like he's trying to peck, but it seems like he can't. I'm at a loss. I've never had anything like this before. Any advice would be greatly appreciated!

Get some photos of the inside of his beak.

Thanks!