Lab and Pit/bully breed. It's truly one of the best mixed breeds you can find, an excellent family dog. Loyal, smart, affectionate, active, protective. People actually breed them on purpose near me and call them "Newark Retrievers". Roman in my signature was 3/4 Lab and 1/4 Pit and of all the dogs I've known in my life (which is in the hundreds) I think he was probably the best. Never met a Lab/Pit I didn't like!