I have an Easter egger hen that won't close her mouth for long...it almost looks like panting. I saw it at lunch when I came home to give them water. She is staying away from the flock too and didn't run to greet me like the others. I did see her poop, so I can assume that end is working. I have not seen her eat or drink...and poured fresh cold water and fresh bowls of hen pellets and scratch, both of which she usually attacks. Any ideas?