We had a fabulous dog that was a Golden Retreiver Rottweiler mix. He was strong, smart and had fantastic structure. He had personality and intelligence. We lost him in an accident and need to replace him. We have had several large purebreed dogs in our lives and he was the absolute best all around companion. We think he was breed in southern California and we have not been able to find a breeder. Can someone help? We live in Colorado.