How to Help an Overweight Cat Lose Weight Safely

Cat obesity is a serious and growing problem — over 60% of domestic cats are estimated to be overweight or obese. Excess weight significantly increases a cat’s risk of diabetes, joint disease, heart disease, and a shortened life. The good news is that with the right approach, cats can lose weight safely and keep it off.

Is My Cat Actually Overweight?

Feel your cat’s ribs — you should be able to feel them without pressing hard. Look at your cat from above: they should have a visible waist behind the ribs. From the side, there should be a slight upward tuck of the belly. If your cat looks round from above, or the belly droops, they’re likely carrying extra weight. Your vet can give you an official body condition score.

Why Cats Gain Weight

The main culprits are free-feeding (leaving food available all day), overly large portions, too many treats and human food scraps, and insufficient physical activity. Spaying and neutering also reduces metabolic rate by around 20–25%, meaning indoor neutered cats need fewer calories than you might expect. Some medical conditions — particularly hypothyroidism — can also contribute.

The Right Way to Cut Calories

Never put a cat on a crash diet — sudden severe calorie restriction in cats can cause hepatic lipidosis (fatty liver disease), which is life-threatening. Weight loss should be gradual: 0.5–1% of body weight per week maximum. Your vet can calculate a precise daily calorie target. Measure food by weight (not volume) for accuracy.

Best Foods for Weight Loss

High-protein, low-carbohydrate wet foods are ideal for weight loss — they’re filling, species-appropriate, and high in moisture. Prescription weight management foods from your vet are formulated specifically for this purpose and often work better than over-the-counter options. Dry food, while convenient, is calorie-dense and easy to overfeed.

Increasing Activity

Indoor cats often lead sedentary lives. Interactive play with a wand toy for 10–15 minutes twice a day burns calories and provides crucial mental stimulation. Puzzle feeders that make cats work for their food slow eating and increase movement. Food-dispensing toys can replace the food bowl entirely for some cats.

Multi-Cat Households

Feeding overweight cats in homes with multiple cats requires careful management — microchip-activated feeders allow only the right cat to access the right food, making portion control possible without food fights or the wrong cat eating from the wrong bowl.

When to See a Vet

Always consult your vet before starting a weight loss programme — they can establish a baseline weight and body condition score, rule out medical causes, and design a safe calorie target. Regular weigh-ins (every 2–4 weeks) track progress and allow adjustments. Cats that aren’t losing weight despite dietary changes need a vet reassessment.

Weight loss in cats is slow and steady — and that’s exactly how it should be. Celebrate small victories. Every pound lost is a meaningful improvement in your cat’s comfort, mobility, and length of life.