I have a 4 foot by 8 foot enclosure with ten 3 week old tufted roman geese in my basement. I always supply adequate water and feed to them. Yesterday when I came home from my real job, I noticed 3 geese had severe rip wounds to their rear end area. Several feathers had violently been plucked out leaving large silver dollar size bloody wounds. One of the geese was the obvious aggressor as he continued to bite at their wounds as I watched. I then separated out this beast in one box, the wounded in another and left the remaining 6 in the enclosure. I treated their nasty wounds with Hydrogen Peroxide. Their feathers were completely plucked out leaving empty quill holes. Will they ever grow back? Any ideas as to why the aggression? Any ideas.