Moved my turkey because of the geese

Sigh. I was hoping to not have to do it. The geese, bless their stinking little hearts , went after the turkey while I was tending to the chickens. I didn't see the work, but I sure heard it. The turkey ended up standing lie the kid in detention and had its tail feathers pulled out. I took the turkey out of the outside pen and put it in with the new ducks.

Some questions:

Now that the little buggers have beaten up on my Thanksgiving dinner, what are the chances that I could seriously add the two ducks to their pen without getting them beaten up? I'm really thinking the geese have to go solo, which is a shame, but I have enough pens to deal with it. Why are they doing this, besides being geese? I suspect it might be dominance/sexual. These guys have been raised with chickens and turkeys. I got them as goslings April 8th.