Thank you for your question. Unfortunately, the Prevue Deluxe Hamster & Gerbil Cage would not be large enough to house your rats in. Your rat should live in a cage, and large wire cages are the best choice. Look for a tall cage so your rat can have plenty of room to climb. A tall cage should have at least 12" x 24" of floor space, and the cage will need lots of shelves and hammocks to create more play space for your rat. However, wire cage floors can cause an injury called "bumblefoot." If your cage has wire floors, cover them with a thin sheet of wood or some other protective material.