I had a dog several years ago. We had to put him down due to illness but before he got ill he was a great dog. The thing was, he was an Akita and if you know about Akitas, you know they are very protective of their owners and they can be mean. Our dog was great so long as we were freindly with you, but if you seemed threatening to us, or made a sudden move towards us, he would go for it. He also was not good around other animals. As a result, we had a 6 foot privacy fence in the back yard with a locked gate and whenever we had him out in the front yard or walked him, we always used a leash. The problem was, I was still afraid to walk him due to the other unleashed animals running aroung. If one of those animals approached us and went after my dog, he was gonna attack right back and I'm not gonna stand there in the middle of it and get mauled.