I used to have a Rott/Lab mix, Buster, that we got at the shelter. We didn't really know what a Rottweiler was and we thought the people at the shelter just made it up. After Buster we had Annie (purebred lab), now we have Carl (purebred Rott). Now after having both breeds, I can see Buster had a lot of Rottie in him, he just looked like a lab - everything else about him was Rottweiler