Mattie's grandpa says: We originally had Oliver; Mattie is his son and the star of the show. We say he has the "me too" syndrome. Mattie is a border collie/Lab cross as are both of his parents. The peculiar thing about Mattie is that his father is black and white, his mom Molly is black, and siblings are black and white or black. Then along came Mattie. Out of nine puppies he was the only brown one. He was brown with black, grey, white, and blonde fur with a sable stripe down his back. From there he went blonde. After that he turned a light copper with a blonde under coat, and he seems to be sticking to that.