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Obese Cat? Chubby Pup? You're Not Alone

Obese Cat? Chubby Pup? You're Not Alone

Written by Pet Wellness Clinics. Medically reviewed by Dinaz Lahewala, DVM, Medical Director, Pet Wellness Clinics.

If your cat has a little extra waddle in her step or your dog's collar keeps getting snug, your pet is not alone. Our Indianapolis veterinarians see overweight cats and dogs every day. In fact, the Association for Pet Obesity Prevention (APOP) found that about 6 in 10 U.S. dogs and cats are above a healthy weight. 

Here's the tricky part: a few extra pounds creep on slowly, and a round belly starts to look normal. APOP's 2025 survey found that veterinary professionals’ biggest challenge in weight conversations is that owners don't see their pets as overweight.  

This isn't about how your pet looks, and it isn't about blame. Obesity in cats and dogs is a health condition and can be resolved with a plan and commitment. The good news? Weight is one of the few health risks you can do something about at home, starting today. This guide walks you through how to check your pet, why a healthy weight matters, and how to help them slim down safely.

How to Tell If Your Cat or Dog Is Overweight 

The quickest way to tell if your cat or dog is overweight is the rib check: you should be able to feel the ribs easily with light pressure. The scale doesn't always tell the full story. A 12-pound cat might be perfect for a big-boned Maine Coon and too heavy for a petite tabby.

That's why our veterinarians use a hands-on exam and an evaluation scale referred to as the body condition score, which includes the rib check. On the 9-point scale, 4 to 5 is ideal, 6 to 7 is overweight, and 8 to 9 is obese. You can do a simple version at home in about a minute.

  1. The rib check. Run your hands along your pet's sides with light pressure, like petting. You should feel the ribs easily, with a thin layer of padding, similar to the back of your hand. If you have to press to find them, or can't find them at all, your pet is likely carrying extra weight.
     
  2. The top view. Stand over your pet and look down. A healthy pet has a visible waist, a gentle inward curve behind the ribs. A straight line or an outward bulge is a sign of extra weight.
     
  3. The side view. Look from the side. A healthy dog's belly tucks up toward the back legs. Overweight cats often have a low-hanging belly pouch that swings when they walk. (A small, loose "primordial pouch" is normal in many cats, so check the ribs and waist, too.) 

Other clues to watch for:

  • Getting winded on short walks or during play
  • Trouble jumping onto the couch or bed
  • In cats, a greasy, matted, or dandruff coat along the lower back, because they can't reach to groom
  • A collar or harness that needs loosening

If your at-home check raises questions, schedule an appointment with one of our vets to discuss weight management for your cat or dog.

The Health Risks of Obesity in Cats and Dogs 

In cats and dogs, extra weight strains the entire body and can shorten their lifespan. In a 14-year study of Labrador Retrievers conducted by the Purina Institute, dogs kept lean lived about 1.8 years longer than their littermates.

A couple of pounds sounds small, but for a 10-pound cat, 2 extra pounds is like a 150-pound person carrying an extra 30. Overweight cats and dogs are more likely to develop:

  • Arthritis and joint pain, which makes moving less fun and leads to even less activity
  • Diabetes, especially in cats
  • Breathing problems and trouble handling Indiana's hot, humid summers
  • Urinary issues in cats
  • Higher risk during anesthesia and surgery

Think of a healthy weight as one of the best gifts you can give your pet: more good years, and more comfortable ones.

Why Pets Gain Weight (It's Usually Not One Thing) 

Most weight gain in cats and dogs comes down to a simple imbalance: more calories in than they burn. Everyday habits tip the scale, such as:

  • Eyeballing food: scooping by eye makes it easy to overfeed without noticing.
  • Free feeding: a bowl that's always full makes it hard to know how much your pet really eats.
  • Treats and table scraps: they count more than most people realize. Treats should be a small part of daily calories; ask us for your pet's number.
  • Indoor living: indoor cats live longer, safer lives, but they burn fewer calories. Long Indianapolis winters keep a lot of dogs on the couch, too.
  • Spay, neuter and middle age: metabolism slows after spay or neuter surgery and again in middle age. That's normal, but food portions should be adjusted to match.

Helping Your Pet Lose Weight Safely 

Most pets should lose no more than 1 to 2% of their body weight per week. Slow and steady wins here. For a 15-pound cat, that's roughly a quarter pound a week at most.

A special warning for cat owners (and important for dogs, too): never put your cat on a crash diet or cut food drastically. When a cat with extra weight stops eating or loses weight too fast, fat can build up in the liver. This condition, called hepatic lipidosis or fatty liver disease, is life-threatening. If your cat skips meals, call us right away.

Sometimes we accidentally restrict food volumes so much that we also deprive them of nutrients and not just calories. It's important to reduce with guidance or consider a different food that helps with weight loss to ensure your pet receives all the nutrition needed.

Here's what a safe plan usually includes: 

  • The right amount of food: our vet will calculate daily calories for your pet's ideal weight. A kitchen scale makes portions exact.
  • The right food: many pets do best on weight management food. For cats, that usually means high protein and low carbohydrate. Some pets need a prescription weight loss diet, which keeps them full while cutting calories.
  • Smarter treats: break treats into smaller pieces or swap for low-calorie options. For many dogs, green beans or carrot slices work well. Treats should be less than 10% of your pet’s total calories for the day.
  • More movement: for cats, aim for at least two 10- to 15-minute play sessions a day. Wand toys, puzzle feeders and cat trees all help. Space out bed, litter box, food dishes, etc. across your home so your cat gets extra steps in throughout the day. For dogs, add a few minutes to daily walks, or try indoor games of fetch and hide-and-seek when the weather is rough.
  • Regular weigh-ins: weigh your pet every two weeks, and track progress with your vet so the plan can be adjusted.

The "best cat food for weight loss" is the one that fits your cat's health, age and tastes, fed in the right amount. Our vets can help you choose.

How Pet Wellness Clinics Can Help

Our Indianapolis veterinarians make weight management simple. At your pet's next visit, we can: 

  • Give your pet a body condition score and set a realistic goal weight 
  • Check for medical causes of weight gain, including screening for hormone-based diseases that may cause weight gain and make weight loss difficult 
  • Calculate daily calories, recommend the right food, and treat allocation 
  • Schedule weigh-ins to keep progress on track 

No judgment, ever. Just a clear plan and a team cheering you on.

Frequently Asked Questions

How do I know if my cat is obese?
Feel for the ribs and look for a waist from above. If the ribs are hard to find and there's no waist, your cat is likely overweight or has obesity. Our vet can confirm with a body condition score.
Can my cat lose weight fast?
No, and please don't try. Fast weight loss can cause fatty liver disease in cats, which is life-threatening. Aim for no more than 1 to 2% of body weight per week, with your vet's guidance.
What's the best cat food for weight loss?
It depends on your cat. Many cats do well on a high-protein, low-carbohydrate weight management food, and some need a prescription diet. Portion size matters as much as the food itself.
Is my kitten overweight?
Kittens are growing fast and naturally look a bit round. If you're unsure, ask at their next checkup. Building good feeding habits early makes a big difference later.
How much exercise does my dog need to lose weight?
It depends on age, breed and health. Many dogs do well by adding 10 to 15 minutes to daily walks. Talk to our vet first if your dog has joint pain or breathing trouble.

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