Hi, I’m new to the forum. I have 3 isa brown cross white leghorn hens (princess layer, Gerty and hen solo) and they are about 2 1/2 years old. Princess Layer has become very sick and I have no idea what’s wrong. She just went through a moult and her feathers have all mainly come through again. She is lethargic and very slow moving or not moving and all she either just stands or lies down. She isn’t using her roost, her comb has shrunk and she has lost a lot of weight (her breast bone is protruding like a centimetre and a half) and she isn’t eating or drinking.