My wonderful 15 lb NJ giant hen has a very purplish comb and face, feels warm to the touch, seems weak and lethargic, has little appetite, and gasps for breath at times. 3 other hens are perfectly fine. I've added antibiotics to the water, and viatmins to the food (including a mash of oatmeal, plain yoghurt and honey). I've been feeding quite a lot of bread to them as snacks that a neighbor gave me. Could there be a link? Does this sound like a specific disease to you? If I had to guess she honestly looks like she has congestive heart failure, but she's less than a year old.