Ava is a very cuddly little pitty that came to us as a shelter pup. We wanted to give our other dog a friend. Ava has been my baby for 3 years now and just recently started to pick on my 10 year old boxer. The vet says that dominance change is a pretty common situation in dog of the same gender. I have NEVER given up a dog before,but I am concerned that no amount of love will trump instincts and one day I may come home to some beast up dogs. I want what is best for both of them. Please help!!!