Hi there. This morning I noticed one of my barred rocks has gone completely pale (photo attached), is lethargic, and won't eat. I checked her for mite/lice (none), her crop is fine, but she feels very skinny. The photo actually makes her appear pinker, she is almost yellow, especially around her cheeks. She might have diarrhea, but it is hard to tell since she appeared sick only this morning and she has not been separated as of yet. My thought is to give the flock a de-wormer today and see if it helps her condition. She is one of 6 hens, but non of the others show any signs of being sick. Any insight would be greatly appreciated. There are so many possibilities, I really don't know where to start. Thank you very much!

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