This is a good start. But the idea that stereotypes are not valid about breeds of dogs is ridiculous. While it is true that all dogs go to heaven, there is a bowl curve when it comes to dog abilities and personalities. Basset hounds are sweet and stubborn. Golden retrievers are beautiful, joyous, dumb blonds.
Mastiffs are lazy but lovable.
Labradors are the kind of dogs you want to have a beer with. Chihuahuas are snappish and temperamental. Judging humans by the color of their skin is different than judging dogs by the texture of their coats. Let's say they do. Even if so, the analogy of dog stereotypes to human racism is mistaken.