Yesterday I noticed one of my GSL hens was acting very lethargic. She hung out by the water fountain and drank constantly. Her comb is bright red and I noticed her legs are very red. She doesn't appear to have leg mites. When I picked her up some liquid ran out of her mouth and her poo looks like the white of an egg. Right now I have her in the house in the bathtub. Any suggestions of what might be wrong with her?