I'm definatly not a pit expert, but there were a couple of pits near my home that were put down for attacking the livestock in the area, they would attack while no one was around and would go strickly for the neck (behaviour due to the owners). If Pete is going for the noses i would think hes protecting or just hasent understood yet that there are bigger aminals on the planet other than dogs. I would give it more time and with any dog keep all meetings supervized. As well i have 2 huskies, both are indoor dogs and they love it. If you leave them outside alone for more than 10 minutes they are wanting to come in just to be near us.