So I have a 5 month old Black Australorp hen that can't close her mouth. She's not having any trouble breathing. She's not gasping. She has her mouth open and even when she leans over to try to pick up some food, you can see her mouth close just a tiny bit, but it can't close and she stands back up. Her eyes looks clear, poop is good, but she just can't close her mouth. Any ideas?