Dogs are easily trained, and can be taught to obey Master. The title of “Master” is easy to transfer – a trainer can teach a dog, and then give it to somebody else. A dog will happily serve whoever he is with, showing all the tricks he’s been trained to do. People call dogs “smart” for that. Cats, on the other hand, practically can’t be trained. They might have one person feeding them, and then for some reasons, known only to them, choose another person as their Master. They would follow him around the house, wait under the door when he’s taking a shower, purr when he pays attention to them, and claim the place on his laps. They can’t be taught for somebody else, and people call cats stupid for this… I like cats, not dogs. PS: Face photo available when trust is gained.