Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

9 Health Risks for Overweight Cats (Vet Answer)

fat-cat-with-mustaches

“Chonky” cats, though rather adorable, may be prone to serious health risks due to being overweight. Nearly 60% of cats in North America are overweight, making obesity one of the most common and preventable diseases affecting domestic cats today. A cat is considered overweight when they are more than 10–20% above their ideal body weight and obese when they’re over 20% of their ideal body weight.

divider 3 paws

Why Is Excess Body Fat Unhealthy in Cats?

Fat secretes inflammatory hormones and produces oxidative stress in tissues and organs. Oxidative stress occurs when there are excessive free radicals in the body and not enough antioxidants to get rid of them. This can damage organs and tissues and may result in various diseases. Currently, obesity is treated as a chronic, low-level inflammatory condition in cats.

Here are the types of felines that are prone to obesity:
  • Middle-aged cats (8–12 years old)
  • Spayed or neutered cats
  • Indoor cats
divider 3 paws

The 9 Risks Associated With Being Overweight or Obese

1. Diabetes

Obesity can make diabetes more difficult to control. Insufficient insulin production or response to the insulin hormone can lead to diabetes mellitus. Insulin is essential for the regulation of glucose, or blood sugar.

domestic striped kitten with a sad face feels sick
Image Credit: Julia Cherk, Shutterstock

2. Heart Disease and High Blood Pressure

Excessive weight can place extra stress on the heart and circulatory system. Extra weight can also impair lung function.


3. Anesthesia Complications

Extra fat may prevent anesthetic drugs from being metabolized properly, which can lead to an overdose.


4. Kidney and Urinary Disease

Kidney-related issues may develop due to excessive body fat, including enlarged kidneys and scarring of the delicate filtering units in the organs. Obesity can also be a risk factor for feline lower urinary tract disease.

Siamese-elder-cat-sick-with-cancer-has-a-feeding-food-tube-attached-to-its-nose-to-stomach
Image Credit: SUJITRA CHAOWDEE, Shutterstock

5. Liver Disease

Obese cats that suddenly stop eating may develop a serious and life-threatening liver condition known as hepatic lipidosis. Excessive fat accumulation in the liver can lead to liver failure.


6. Arthritis

Excessive weight on joints adds to the wear and tear of the bones and cartilage and can lead to painful chronic conditions, such as osteoarthritis.

male vet examining a cat with stethoscope in clinic
Image Credit: Africa Studio, Shutterstock

7. Immunodeficiency

Chronic inflammation due to excessive fat may cause an immunodeficiency and may make it difficult for your cat to fight off infections. This may also lead to cancer.


8. Grooming Issues

Obese cats may have difficulty reaching and grooming themselves, which can lead to a matted, greasy, soiled, and unkempt hair coat. Improper grooming may also lead to skin infections.


9. Shorter Life Expectancy

Excess body fat can shorten a cat’s lifespan and lead to disease. According to the VCA, “a 2.8-fold increase in mortality has been shown in obese cats (8–12 years old) compared to lean cats.”

We recommend getting advice from a veterinarian if you have any questions or concerns regarding your pet’s diet and weight.

Need veterinary advice but can't get to the clinic? Catster recommends PangoVet, our online veterinary service. Talk to a vet online and get the answers and advice you need for your cat without having to leave your living room — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

divider 3 paws

Conclusion

Obesity in cats can lead to several health issues. Preventing obesity, however, often incorporates the right amount of exercise and nutrition to keep your cat fit and trim. Discussing your cat’s medical history, lifestyle, and diet with your veterinarian often leads to healthier pets in the long run.


Featured Image Credit: Kseniya-Bogdanova, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Low Blood Pressure in Cats: Our Vet Explains the Signs, Causes, Treatments & FAQ

Low blood pressure occurs less commonly in cats than high blood pressure does. Causes may include blood loss, severe infection, heart disease, or...

Devon Rex Cat Health Problems: 8 Vet-Reviewed Inherited Issues

The Devon Rex is a unique breed beloved by those who keep them. These cats tend to be relatively healthy, especially when they...

Most Popular Cat Names That Start With E in 2025

If you’ve recently adopted a cat and are looking high and low for a great name for your companion, get ready to have...

Why Does My Cat Throw Up After Eating? 8 Vet-Reviewed Reasons & Solutions

If your cat starts throwing up after they eat, it’s obviously very alarming behavior that you want to get to the bottom of...

More related

How to Teach a Cat to Sit: Step-by-Step Guide

When you think of behavior training for a pet, you typically think of dogs. However, despite their well-known stubborn and independent streaks, it’s...

Can I Crate My Cat During the Day? Vet-Approved Tips & FAQ

If your cat gets into trouble when left home alone, you might be desperate for a solution, especially if they’re prone to destructive...

Risks of Steroid Injections for Cats: Challenges and Management

Steroid injections are used to treat a variety of conditions in cats, ranging from allergies to autoimmune diseases. Although steroids are essential for...

Tabby British Shorthair Cat: Info, Pictures, Origin & History

British Shorthair tabby cats are some of the most beautiful cats you’ll ever meet. The round faces and soft fur make the British...

Keep reading

My Cat Is Bored but Won’t Play, What’s Wrong? 6 Common Reasons

Most cats play throughout their life, though they are most playful in their kitten years.Under human care, cats don’t need to hunt or do many other things to aid in their survival. Therefore, they often have a lot of pent-up...

sad, bored or sick cat

Cat Preventive Care for Good Health & Longevity: 8 Fundamental Pillars

There is an aspect of veterinary medicine that is called preventive care; meaning preventing health problems through proactive measures. Preventative care means better health outcomes and a happy, comfortable cat. This guide will cover the importance of preventive care in...

cat being observed by a female veterinarian

Why Is My Cat Obsessed With the Toilet? 6 Possible Reasons

Seasoned cat owners know our feline friends are prone to unique behaviors and quirky habits. One of the most puzzling cat fascinations you might observe may also leave you feeling slightly disgusted. Some cats just seem to love the porcelain...

black and white cat sitting on the toilet bowl

Why Is My Cat’s Fur Suddenly Matted? 7 Vet-Reviewed Reasons

Cats are famous for keeping themselves clean and looking neat all the time. In fact, some would say that cats are obsessive groomers. It’s safe to assume that if your cat isn’t sleeping, they’re probably grooming instead. That’s why it’s...

combing fur of a maine coon cat

Crave Cat Food Review 2025: Recalls, Pros & Cons

Crave Cat Food is manufactured by Mars Petcare and has been on the market since 2017. The brand currently offers a limited variety of dry foods, all of which are grain-free and high in protein. The food is affordable and...

Crave Cat Food Review

How Much To Feed a Cat & How Often? Vet Approved Portion Chart

Your cat’s diet plays a major role in its well-being. If you feed your cat too much or too little, they won’t maintain optimum health. Likewise, a lack of nutrients can lead to a deficient feline while an overabundance can...

sphynx cat eating dry kibble from metal bowl

Why Is My Cat Losing Hair? 9 Causes & Treatments (Vet Approved)

Hair loss in cats, officially known as alopecia, is a fairly common occurrence. The range of how much hair is lost and on what parts of a feline’s body can vary widely, however, and this largely depends on the exact...

pet hair brush with pet fur clump after grooming cat on the floor

Why Is My Cat’s Poop Watery? 8 Vet-Approved Reasons

Changes in bathroom habits are one of cat parents’ biggest causes of worry. Though diarrhea in cats isn’t the most unusual phenomenon, it’s crucial to figure out what may be causing it, especially if it’s regularly affecting your cat. Watery...

orange cat pooping on the grass