Both guinea pigs and rabbits need a comfortable and safe living environment, with plenty of room to move around and play. Guinea pigs should have access to a clean and secure cage, with a comfortable bedding area and a separate area for food and water. Rabbits also need a clean and secure cage or hutch, but they require a larger area to move around and a designated exercise area. Both species need a diet of hay, fresh vegetables and fruits, and a small amount of commercial feed.