Our 2 year old hen Lil Peep has this bump on the back of her neck that looks like some sort of cyst. We noticed a small lump under her feathers over 6 months ago but she was never lethargic or anything so we never bothered to get a good look at it. My family says her weight has pretty much been the same, and we can't really tell which eggs are hers but we do think she's not laying often enough so we're thinking this thing is affecting her egg production. I had someone else hold her so I could pull the feathers away and this thing looks HUGE. Does anyone know what this is and how to get it to go away?