Many cats are lazy, shiftless creatures, which explains why people love them so much. However, cats that don’t get exercise can risk getting overweight and unhealthy. So to keep your cat from getting out of shape, make sure it exercises daily.
For indoor cats, consider getting the smart cat treadmill. Like a hamster wheel, the cat treadmill lets your cat walk around without actually going anywhere. By using a light to attract your cat’s attention, the smart cat treadmill supposedly gives your cat an incentive to walk. Whether this will work with your cat or not remains in question though, but it might be worth trying to give your cat a chance to stay in shape without killing something.