Hello, I have two chickens. One is a Rhode Island Red hen that doesn't seem to be having any issues. My other yellow chook is shedding feathers like crazy (not any particular area) and has blisters (some are a little yellow, some just blood) on her face. She hasn't laid in a week (which for months she's consistently laid daily) She isn't getting bitten, if anything shes the feisty one of the pair. Do I need to get her antibiotics? Will it be safe to consume her eggs or meat after shes had antibiotics? These are my first chickens, Ive had them 8 months without any issues...Any advice?