I have 2 dogs, Matild and Jerry. While Jerry, a lab and mastiff mix, is very laid-back and loves everyone, Matilda is the problem. She was not well socialized as a puppy, and spent most of her time in a cage. She was adopted and returned 3 times before I decided to take her home. I have had her for almost 2 years, and while she has shown some progress, she is still aggressive towards other people. She is a heeler mix, and she has many of the behaviors of a herding dog. I am looking into all sorts of therapy, because she is a very sweet and intelligent dog, and I know she can get through this. It will just take a lot of time.