Granted, dogs can now walk themselves... on two feet. Now bipedal, they quickly adapt and overthrow humanity. They decide to keep humans as pets. Your dog now takes you out for walks and grumbles about how much easier it would be if you could just walk yourself...
I don't know where you live, but we shouldn't get too high and mighty. Pigs are of similar intelligence, and the consumption of pork is more widespread than that of dogs.