I have been told that if a chicken's comb is pale in color, that the;y are sick ! I have 4 hens that are about 2 years. I have one that has lost lots of feathers (feathers all around the coop) she felt like a porcupine to pick up. She has now stopped loosing feathers and is now sprouting pretty new ones! She eats well and her eyes do not look cloudy. But her comb is paler than before, and lighter than the rest of the hens. Is there anything I can do.