actually, I was under the impression that they do it before the dog breaks teeth, simple so it won't happen in the feild. The toes and nails are also reinforced.
The stomachs are also sewn to the abdomen wall to prevent tortion during jumps.
And its only done to a few dogs.
And I would think it to be smart. A dog who busts something ibecauses generally a pain in the ass. Not so much because the dog would be in pain, but... Well, flinging blood comes to mind. Especially on busted toes.
I'm suprise they don't also crop ears, as injuries to the ear generally result in a distracted dog, and more flinging blood. Ear injuries take forever to heal, because dogs shake their heads. But I guess, since the generally have prick eared dogs, and people at large are not a fan of earcropping, they don't do it.
The Anatolians Louise sold to the Air Force many years ago had their teeth and stomachs done.