Some cats live indoor. If your cat lives indoor, you should have a clean litter box. You should clean it everyday so they have room to do their business. You should have scratch posts because most cats love to sharpen their nails or just like to mark their territory. You should have a cat acceptable dog if you own one. You should lay out food and water if your cat likes to eat a little bit at a time. You also need to keep stuff off the ground because your cat can eat it and poison themselves. You should also know that your cat can scratch on the sofa and sometimes not use the litter box.