I've got a 6 week old Cornish X (scheduled to butcher in 1.5 weeks) that has a large lump on her breast, sort of below her crop. It's HUGE and fills my cupped hand. It's very soft, almost jiggly, like it's full of water or fluid. She doesn't seem in pain or particularly unhappy, and she's still eating. Has anyone ever seen this? Any idea what it is? There's not much to see from the outside, so I'm not sure a photo would help. It just looks like a lopsided chicken breast.