We also have a lab/pit mix. Best puppy in the world. He is adapted to the family very well. He has built a strong, and very different relationship with each member of the family. At first, he seemed very aggressive towards other dogs. I believe he just really wanted to play, but came across as a little aggressive. After adapting into the family and some training he has become very agreeable to most situations. I will say that our dog needs exercise… and a lot of it. My husband often takes him to the local baseball park where he can lock the fence and let him go. He LOVES it…. good luck and I am sure you will find this is a very sweet loving dog.