That sucks but I'll admit I'm one that doesn't trust the breed. It's not the fault of the breed, just they way people have selectively bred in certain traits for awful reasons.
My neighbor runs a rescue. She has a 10yo pitt that is "supposed" to be the "sweetest thing". Dog attacked one of her other dogs. Bit down so hard, blood sprayed 4 feet and got all over my wife's dress who was a the fence talking to the neighbor.
The American Kennel Society lists pitt's as the leading cause of fatal attacks at around 72 percent (couple of years ago). Next in line are Rottweilers at around 10.
Again, I don't blame the dog, it is what it is, but I don't trust them any farther than I could throw one.
Btw, the neighbor being the understanding type, installed some additionel wire fencing at the lower half of our fence, on her dime, to help mitigate any damage to our dogs and and my grand daughter. And no, I don't let my grand daughter anywhere near that fence.
And again, I'm sorry you have to put it down but I think it's the right thing to do, especially if there are any kids around.
