We adopted a stray chicken 2 years ago. She was found on the roadside, by no home or farm. Her beak has been cut. She has a history of lice infestation, more than likely because she can't fight the bugs off with a cropped beak. For the last week, she has become very sick. The is lethargic, wandering almost like she is delirious. She has little energy and is hunched over and weak with diarrhea. She has lost weight. We bathed her in Neem last week with a vinegar rinse. I also went another step and used the Garden/Poultry dust with Pyrethrin. She presently has no sign of lice but she continues to be very ill. She is eating but is picky about what she eats. Any ideas on medication and diet to give her strength and energy? I have given her some vitamins. I see no signs of mites. Suggestions appreciated. I really hate to lose her. I have separated her from the flock but I think she is depressed. Thanks upfront for ideas.