Provide plenty to keep your cat occupied indoors. Provide your cat with secure cat condos which offer acceptable and interesting places for your cat to lounge, play and scratch. You should also provide scratching posts, corrugated cardboard or sisal rope for your cat to scratch and praise your cat for using them. To encourage your ex-outdoor cat to exercise, offer interesting toys, especially those that are interactive. These usually consist of a long pole and attached line with fabric or feathers at the end of the line.
Some cats enjoy searching for toys.
Be sure that the toys are not so small that they can be swallowed or get stuck in your cat's throat. Cats also enjoy ping pong balls, paper bags and cardboard boxes. Provide your indoor cat with fresh greens. You can buy kits that include containers and seeds to grow, or plant pesticide-free alfalfa, grass, bird seed, or catnip in your own container. This way, your cat can graze safely and not destroy your house plants.