Heavier-set cats can definitely use the wheel as long as they are under the weight limit. It may take a little more effort to get them using the wheel, especially if they have a lower energy level than most cats. The key is in the training and making sure that the reward they are receiving is worth the effort until they start to realize how much they can enjoy the wheel without an incentive. Patience and consistency with your training routine are a must! Once your cat starts using the wheel regularly you’re likely to see some weight loss, but this can be offset somewhat by muscle gain. Even if your cat’s total weight doesn’t drop dramatically, they'll become visibly leaner and more fit as they burn off excess fat.