On Nintendogs + Cats, you can a dog or a cat. The first pet has to be a dog, but after that you can get as many cats as you want. There are lots of breeds of dogs while there is 3 types of cat. They are, Standard, Oriental and Longhair. There might only be three types of cat, but they have wide range of colours and you can have really any breed you want. With dogs, you have to unlock the breeds. You start with nine dog breeds. To unlock the other breeds, you must earn owner points.