We’re glad you’re concerned, Marcus, because overweight pets are at a greater risk for developing diseases such as diabetes. We recommend a visit to the veterinarian, who will examine your cats to determine how healthy they are. If your pets are overweight but healthy, you can start them on a weight-loss program.
We generally recommend high-quality "light" commercial products combined with exercise, but based upon your cats' examinations, your veterinarian will be able to recommend specific diets for them. Just keep in mind that weight loss in pets, like weight loss in people, should be a gradual result of diet and regular exercise.
We also recommend encouraging your cats to play. Find toys that they enjoy and rotate them regularly so that they continually have new sources of stimulation. Cats can also be taught to fetch—a great way for them to exercise.
Please visit our online Animal Behavior Center for more ways to keep your cat active.