after reading all these posts I wonder why people bring such stress on themselves. it's hard enough watching and training one puppy and I would venture to say it's harder to train an aggressive breed puppy, so now not only do you have to train it, you need to keep it seperated from your other dogs.. Jeeesh everyone has a right to their own decisions but personally that would be to much stress and not enough fun trying to keep the dogs apart, even when supervised a problem can happen. I know I am not man enough for the job