Well in my house I'm alpha dog and the dogs fall in line behind me. no one fights because its not allow if they try they get a time out. and we have a very happy home. I had a dog when I got Charlie and she was very stubborn and would get extremely aggressive with Charlie over toys and bully sticks and the such. It got to the point where she would not listen and twice she bit Charlie hard enough to break the skin on Charlie neck. She weighed 5 lbs Charliie weighed 1 and 1/2 lbs. I was afraid she would kill him by accident so I found her the perfect home where she is the only pet and has 12 acres to run and play on the couple are both truck drivers so she never has to be home alone. and we have a happy household with no fighting allowed. Arguments between the dogs is one thing but fighting should never be allowed someone could get hurt jmho