Should a lab have any black in the roof of his mouth? Is he born without rear dew claws? Training a new roadside rescue. Think he's a lab, but he seems too strong, has a wrinkle across his head when he is smelling a track. His eyes seem more pitbull like than lab, and his skull is wider than labs, short muzzle. Just wondered if any sign of black in the roof of mouth is present in pure bred labs.