Hey Everyone! So, today we butchered 30 roos. We started out with a discounted lot of chicks from tractor supply and had no idea how great pullets are compared to straight runs. We have almost 300 chickens, so you can imagine the roo overpopulation. Anyway, a few (3 or less) of the roos had a small to large bump on their chest. When we cut it off, it appeared to be some kind of cyst with liquid in it. It was always located in the middle of the breast. What is this? Thanks for your input!