I have a black, sex-link hen that is approximately 4 years old. She is a free range bird, but has access to layer pellets, oyster shell, water, etc. For no reason that I can tell, my other 5 hens attacked her one day and tore up her comb pretty good. I isolated her from the others. The next day (still isolated), she was walking around fine and acting normal, except for the little problem that she is not eating. She drinks water. Her crop is empty. Her poop is white. Five days have passed and it is the same. She lays around alot all day on a chaise lounge thingy in the back yard. When I pick her up, she seems alert and looks around... I don't know how much longer she can last or whether or not I should go ahead and put her out of her misery. I checked her vent and felt her abdomen and felt nothing unusual. My other 5 hens are in fine form. Apparently, the other hens know something I don't and they wanted her out of their flock. Any thoughts?