Is My Cat Overweight? Signs, Risks & What to Do

It’s hard not to spoil our cats by showering them with all the things they love -- noggin scratches and cuddles, and oftentimes food and special treats. But the next time you reach for those snacks, you might want to think twice. Obesity in cats can be a real problem, and might even lead to other health risks.

According to the Association for Pet Obesity Prevention, 60% of cats in the United States were overweight or obese in 2018. Obesity in cats can happen because of overfeeding, a lack of exercise, or because of other health-related factors that may cause your cat to keep weight. Whatever the problem, it’s important to find the root cause and try to fix it, since excess fat in cats can cause orthopedic issues, skin disorders, kidney problems, chronic inflammation and much more. It could even shorten your cat’s lifespan.

How to assess your cat's weight

When you look at your cat, you should be able to see their waistline from a top view as well as a slight upward indentation from a side view. When petting your cat’s side, if you cannot feel any ribs, or you notice a pronounced “pooch” from a side view, your cat may have extra weight on them.

However, based on your cat, it may be difficult to tell if your cat is overweight by simply looking at them, which is where actual numbers, and the help of your veterinarian, come in. While weight ideals can vary based on your cat’s breed and other factors, the ideal weight for the average adult cat is between eight and 15 pounds. Cats of a healthy weight should be able to move around with ease and they will enjoy activities like playing and chasing.

If you’re unsure about your cat’s weight, you can use this healthy pet weight calculator as a gauge, and if you’re concerned about your cat’s heaviness, or if you find your cat nearing the 10 to 18 pound range (again, based on breed), consult with your veterinarian.

What to do if your cat is overweight

Why Is My Cat Overweight? The Most Common Causes

If your cat is carrying extra weight, the first step toward helping her is understanding why the pounds crept on. Weight gain in cats is rarely a single-cause problem — it's usually a combination of diet, lifestyle and sometimes an underlying health condition. Here are the most common reasons an overweight cat ends up that way:

Overfeeding and free-choice feeding Leaving dry or wet cat food out all day — known as free-choice or "grazing" feeding — makes it nearly impossible to track how many calories your cat is actually consuming. Cats are not reliable self-regulators, and many will eat well past their energy needs when food is always available. Even small daily surpluses add up quickly: just 10 extra calories per day can translate to roughly one pound of fat gain per year.

Calorie-dense or nutritionally unbalanced food Not all cat foods deliver the same calorie load per cup or per pouch. Foods high in fat and simple carbohydrates can push daily calorie intake above what an indoor cat needs without the pet parent realizing it. Reading the guaranteed analysis and feeding guidelines on any cat food label is a good starting point, but your veterinarian can help you calculate your individual cat's true daily calorie target https://www.aafco.org/consumers/understanding-pet-food/.

Too many treats Treats should make up no more than 10% of your cat's total daily calorie intake. When treats are given freely — or when table scraps enter the picture — those extra calories stack on top of regular meals and contribute directly to weight gain https://wsava.org/global-guidelines/global-nutrition-guidelines/.

Low activity level Cats are carnivores built for short bursts of intense activity, but indoor cats often spend the majority of their day resting. Without regular play and environmental enrichment, the calories your cat takes in simply aren't being burned off. Boredom can even drive some cats to eat more than they need.

Age and metabolism changes A cat's resting metabolic rate slows as she ages, meaning an older cat needs fewer calories to maintain the same body weight than she did as a kitten or young adult. Feeding the same amount year after year — without adjusting for life stage — is a common path to gradual weight gain https://www.merckvetmanual.com/management-and-nutrition/nutrition-small-animals/nutritional-requirements-of-small-animals.

Being spayed or neutered Altered cats have lower energy requirements than intact cats — studies suggest the caloric needs of a spayed or neutered cat may drop by as much as 20–30% after the procedure https://www.merckvetmanual.com/management-and-nutrition/nutrition-small-animals/nutritional-requirements-of-small-animals. Many pet parents continue feeding the same pre-surgery portions without realizing an adjustment is needed.

Underlying health conditions Sometimes weight gain signals something beyond diet and lifestyle. Hypothyroidism and other hormonal disorders can slow metabolism and cause a cat to gain weight even on a normal diet. If your cat's weight has increased despite no obvious changes in food or activity, a veterinary visit is important — your veterinarian can rule out medical causes before any weight-loss plan begins https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information.

Quick reference: Common causes of weight gain in cats | Cause | What's happening | What to do | |---|---|---| | Free-choice feeding | Unlimited access leads to overeating | Switch to measured meals | | Calorie-dense food | More calories per serving than cat needs | Review label; ask your vet about portion size | | Excess treats | Treats push daily calories over target | Keep treats ≤ 10% of daily intake | | Low activity | Calories in exceed calories burned | Add daily interactive play sessions | | Age-related metabolism slowdown | Older cats need fewer calories | Adjust portions as your cat ages | | Spayed or neutered status | Altered cats have lower energy needs | Recalculate calorie needs post-surgery | | Health condition | Hormonal or metabolic disorder | Consult your veterinarian |

How to choose the right food to manage your cat's weight

Choosing the Right Food for an Overweight Cat

Nutrition is the single most powerful tool you have for helping your cat reach and maintain a wholesome weight. But not all "weight management" foods work the same way — and simply feeding less of a regular formula isn't always the right answer. Here's what to look for and how to put it into practice.

Calories First: Know Your Cat's Daily Target

Every weight-loss plan for a cat starts with calories. Feeding even a small amount more than your cat burns each day leads to gradual weight gain over time. Your veterinarian can calculate a specific daily calorie target (sometimes called a resting energy requirement, or RER) based on your cat's current weight, body condition and health history — so ask at your next visit before making changes.

As a general principle, weight-loss diets for cats are formulated to deliver fewer calories per cup or can while keeping your cat feeling satisfied. https://www.merckvetmanual.com/management-and-nutrition/nutrition-small-animals/nutritional-requirements-of-small-animals

Prioritize Protein, Reduce Carbohydrates

Cats are obligate carnivores, which means their bodies are built to run on animal-sourced protein — not grains or starches. https://www.merckvetmanual.com/management-and-nutrition/nutrition-small-animals/nutritional-requirements-of-small-animals When a cat loses weight, adequate dietary protein helps preserve lean muscle mass so the weight that comes off is fat, not muscle. https://sites.tufts.edu/petfoodology/

When comparing labels, look for:

• A named animal protein in the first ingredient (chicken, turkey, salmon, tuna)
• Higher protein on a dry-matter basis — weight-management formulas often target 40 % or more protein on a dry-matter basis
• Moderate fat to reduce calorie density without eliminating the fat-soluble nutrients cats need
• Controlled carbohydrates — excess starch contributes calories your cat doesn't need and doesn't process as efficiently as protein https://sites.tufts.edu/petfoodology/

Wet Food vs. Dry Food for Weight Loss

Food format matters more than many pet parents realize. Here's how the two main options compare for an overweight cat:

Many veterinary nutritionists suggest that wet cat food can be a particularly useful tool for weight management because its high moisture content adds volume to a meal without adding calories, helping your cat feel satisfied. https://sites.tufts.edu/petfoodology/ That said, a high-quality weight-management dry formula can also be effective when portions are carefully measured. Browse cat food options to compare formulas side by side.

Look for an AAFCO Nutritional Adequacy Statement

Whatever formula you choose, confirm it carries an AAFCO nutritional adequacy statement for "maintenance" or "all life stages." This statement means the food has been formulated or tested to meet established nutrient profiles — so your cat gets complete nutrition even while eating fewer calories. https://www.aafco.org/consumers/understanding-pet-food/ The statement appears on the back or side panel of the bag, dry food container or wet food label.

Feeding Schedule and Portion Discipline

How you feed is just as important as what you feed:

1. Measure every meal. Use a kitchen scale or a level measuring cup — never estimate. Even a small daily surplus adds up over weeks.
2. Switch from free-feeding to scheduled meals. Two to three measured meals per day gives you control over total daily intake and helps you notice quickly if your cat's appetite changes.
3. Count treats. Treats should make up no more than 10 % of your cat's total daily calories. Factor them into the daily calorie budget before you feed them, not after.
4. Transition gradually. Move from your cat's current food to a new weight-management formula over 7–10 days, mixing increasing amounts of the new food with decreasing amounts of the old. A sudden switch can cause digestive upset and food refusal.
5. Weigh your cat monthly. Healthy weight loss in cats is slow and steady — typically no more than 0.5–1 % of body weight per week. Faster loss can trigger a serious liver condition called hepatic lipidosis. https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information

A Note on Prescription Weight-Management Diets

If your cat is significantly overweight or has a related health condition such as diabetes or joint disease, your veterinarian may recommend a therapeutic (prescription) diet. These formulas are more precisely calibrated than over-the-counter weight-management foods and are dispensed under veterinary supervision. They are not a substitute for a vet visit — they are a reason to schedule one.

When in doubt, ask your vet. Before changing your cat's food or calorie intake, a brief conversation with your veterinarian ensures the plan is safe and right for your individual cat's needs.

Petco's picks for nutrition to help manage your cat's weight

Purina Pro Plan Weight Control Cat Food

Hill's Science Diet Adult Perfect Weight Cat Food 7 lbs.

Hill's Science Diet Adult Perfect Weight Cat Food 15 lbs.

WholeHearted Grain-Free Weight Control Cat Food

ORIJEN Grain Free Fit & Trim Suppor Healthy Weight Cat Food

What to Do If Your Cat Is Overweight

Recognizing that your cat carries extra weight is the first step — now it's time to act. A thoughtful, consistent plan covering food, activity and regular check-ins with your veterinarian gives your cat the best chance of reaching a wholesome weight safely.

1. Adjust Portions and Treat Habits

Treats are one of the easiest places to start. They should account for no more than 10% of your cat's total daily caloric intake — and on a weight-loss plan, even that ceiling deserves a second look. https://wsava.org/global-guidelines/global-nutrition-guidelines/

Beyond treats, measure every meal. Free-feeding (leaving dry food out all day) makes it nearly impossible to track how much your cat is actually eating. Switch to scheduled, portioned meals using the feeding guidelines on your cat's dry or wet food as a starting point — then confirm the right target with your veterinarian, since those guidelines are written for the average cat, not yours specifically. https://www.aafco.org/consumers/understanding-pet-food/

When choosing a food, look for an option formulated for weight management or ask your vet about a therapeutic diet. Wet food can be a useful tool here: its higher moisture content adds volume and promotes a feeling of fullness with fewer calories. Explore wet cat food options as part of a balanced approach. https://sites.tufts.edu/petfoodology/

2. Add More Movement to Her Day

Cats are carnivores built for short, intense bursts of activity. https://www.merckvetmanual.com/management-and-nutrition/nutrition-small-animals/nutritional-requirements-of-small-animals Even an indoor cat who seems content to nap all day can be coaxed into meaningful exercise with the right motivation.

Try these strategies to get her moving:

• Interactive play sessions — Wand toys, feather teasers and laser pointers tap into her natural hunting instincts. Aim for two 10–15 minute sessions per day.
• Puzzle feeders and food-dispensing toys — These slow down eating and turn mealtime into a mentally stimulating activity, so she works for every kibble.
• Vertical space — Cat trees, shelves and window perches encourage climbing and jumping, which burns more calories than walking on flat ground.
• Rotate toys regularly — Cats lose interest quickly; novelty keeps engagement high.

Even small increases in daily movement add up over weeks and months.

3. Schedule a Veterinary Check-In — and Keep Going Back

Before making significant changes to your cat's diet, consult your veterinarian. Rapid weight loss in cats can trigger a serious condition called hepatic lipidosis (fatty liver disease), so any plan should be gradual and supervised. https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information

Your vet can:

• Rule out underlying medical causes (hypothyroidism, fluid retention and other conditions can mimic or cause weight gain)
• Calculate a precise daily calorie target based on your cat's ideal body weight
• Recommend a therapeutic weight-loss food if appropriate
• Set a realistic timeline — most cats should lose no more than 0.5–2% of body weight per week

Once a plan is in place, schedule monthly weigh-ins — many Petco locations offer complimentary weight checks — so you can track progress and adjust before small setbacks become bigger ones.

4. Monitor Progress at Home

Between vet visits, use the body condition score (BCS) as your at-home gauge. Run your hands along your cat's sides: you should be able to feel her ribs without pressing hard, and she should have a visible waist when viewed from above. If that's still not the case after several weeks on a new plan, let your vet know. https://wsava.org/global-guidelines/global-nutrition-guidelines/

Keep a simple log — weight, food amount, treat count and activity notes — even a quick note on your phone each day. Patterns in that data will help your veterinarian fine-tune the plan faster.

Getting an overweight cat back to a wholesome weight takes patience, but every small change compounds. Tighter portion control, more intentional playtime, the right cat food and a veterinarian guiding the pace — that combination gives your cat the foundation she needs for a longer, more comfortable life by your side.

Frequently Asked Questions

Why is my cat overweight? The most common cause is overfeeding — even a small daily surplus of calories adds up quickly over months and years. Lack of physical activity is a close second, especially in indoor cats who spend most of their time resting. Medical conditions such as hypothyroidism or hyperadrenocorticism can also cause weight gain, as can certain medications. Age plays a role too: older cats tend to be less active, and altered cats have lower caloric needs than intact cats. If your cat is gaining weight despite a controlled diet, ask your veterinarian to rule out an underlying health issue. https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information

How much should I be feeding my overweight cat? There is no single answer — the right portion depends on your cat's current weight, target weight, age, activity level and the caloric density of the food you're using. Your veterinarian or a Petco-knowledgeable associate can help you calculate a daily calorie target. As a starting point, always follow the feeding guidelines on the food label and measure portions with a standard measuring cup rather than estimating. Remember that treats should account for no more than 10% of your cat's total daily calories. https://www.aafco.org/consumers/understanding-pet-food/ https://petnutritionalliance.org/

What is a healthy weight for a cat? For the average adult domestic cat, a wholesome weight typically falls between 8 and 15 pounds, though this range varies by breed — a Maine Coon will naturally weigh more than a Siamese. Body condition score (BCS), a 1–9 scale used by veterinarians, is often more informative than the number on the scale alone. A cat at an ideal BCS should have ribs that are easily felt but not prominently visible, a visible waist when viewed from above and a slight abdominal tuck when viewed from the side. https://wsava.org/global-guidelines/global-nutrition-guidelines/

Can a weight-management cat food really make a difference? Yes — foods formulated for weight control are typically lower in calories and fat while being higher in protein and fiber, which helps cats feel fuller on fewer calories. Cats are carnivores, so maintaining adequate protein during weight loss is especially important to preserve lean muscle mass rather than losing it along with fat. Look for an AAFCO nutritional adequacy statement on the label to confirm the food meets minimum nutritional requirements for your cat's life stage. https://www.aafco.org/consumers/understanding-pet-food/ https://sites.tufts.edu/petfoodology/

Are there health risks if my cat stays overweight? Yes, and they are serious. Excess body fat in cats is associated with orthopedic problems (including arthritis), diabetes mellitus, urinary tract disease, skin disorders, chronic inflammation, kidney disease and a measurably shorter lifespan. Because cats are obligate carnivores with a unique metabolism, they are also at elevated risk for hepatic lipidosis (fatty liver disease) if weight loss happens too rapidly — another reason a veterinarian-guided plan matters. https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information https://www.merckvetmanual.com/management-and-nutrition/nutrition-small-animals/nutritional-requirements-of-small-animals

How can I help my cat lose weight safely at home? Start by scheduling a veterinary visit to confirm there is no underlying medical cause and to set a realistic target weight. From there, focus on three levers: measured, calorie-appropriate meals (no free-feeding); scheduled interactive play sessions of at least 10–15 minutes twice daily to increase activity; and strict treat limits at or below 10% of daily calories. Avoid crash diets — a safe rate of weight loss for cats is generally around 0.5–2% of body weight per week. Slow, steady progress protects muscle mass and reduces the risk of hepatic lipidosis. Always loop in your veterinarian before making significant changes to your cat's diet or exercise routine.

Cat Weight Management at a Glance

Use this table as a quick-reference guide. Every strategy works best alongside a plan developed with your veterinarian — especially if your cat has an underlying health condition contributing to weight gain.

A note on safe weight loss: Cats should lose weight slowly — rapid weight loss can trigger hepatic lipidosis (fatty liver disease), a serious condition. Always work with your veterinarian to set a realistic, safe target rate. https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information

This article was created with assistance from AI tools and reviewed for accuracy by Petco's content team.