my male lab, doesnt look like a pure lab. the lady we got him from when he was 2 months old said he was part GSD he doesnt seem to have many qualities of a GSD. i was on pinterest and saw a pitbull lab mix and it looked a lot like my boy. hes now a year and 10 months, and he looked like a full grown male "lab" at 6 months. i see a lot of labs around and they are smaller chested and smaller in general then he is.he has exess(?) skin on his head and around his mouth. he has a big head, big chest and his legs and shoulders are pure muscle! these are him resently. i dont care if he is part pitbull hes one of the sweetest dogs ive had! hes not adgressive in any way, and hes very loving!