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)

Share

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.

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.


Catster's Digital Magazine is Back!

Vet-approved health & behavior advice

Real cat stories & community features

The Bite Stuff: The Truth Behind a Cat’s Sudden Nip

A cat bite that seems to come out of nowhere is one of the more confusing things a cat owner deals with. Everything...

Your Cat’s Purr Proves They’re One of a Kind

There are few sounds more comforting to a cat parent than the familiar rumble of a purring cat. You probably know your own...

“Pspsps!” Why Cats Find This Sound Irresistible

There are a few things that will capture the undivided attention of virtually any nearby feline: the sound of a can of tuna...

“Trophy Pets”: Two Rescued Lions Finally Find Freedom

Ori began life in a basement. BenTzur was found tied to a tree on a short rope. Both were rescued as lion cubs...

More related

Bengal Cat vs. Maine Coon: Main Differences (With Pictures, Vet-Reviewed)

The Bengal and the Maine Coon are both impressive and magnificent specimens of the feline species. If they are easy to distinguish at...

Turkish Vankedisi: Info, Pictures, Care & Traits

The Turkish Vankedisi is a medium to large-sized cat known for their luxurious white coat. They also have affectionate and friendly personalities, and...

How to Train a Savannah Cat: 5 Vet-Reviewed Tips & Tricks

As majestic as a wild cat and as friendly as a house cat, the Savannah Cat is unique and intelligent and has been...

Do All Cats Hate Water? Vet-Verified Info & Bathing Tips

Lots of dogs love jumping into ponds, swimming pools, or the ocean. But would a cat even take the plunge and dip their...

Keep reading

10 Best Hypoallergenic Cat Shampoos of 2026 – Reviews & Top Picks

Just like us, our cats can have sensitive skin. If your cats can’t handle all the chemicals and fragrances that lots of companies use in their products, you might be on the search for something much more natural. Luckily, there...

tabby cat taking a bath

How Long Does a Cat Hold a Grudge? Vet-Reviewed Information

Your cat doesn’t hate you. Thankfully, humans are the only species that write vengeful songs about our exes and actively harbor bitterness. Although cats don’t technically hold grudges, that argument might be a tough one to prove at times when...

owner petting a hissing angry tabby cat

Are Irises Poisonous to Cats? Vet Approved Facts & Safety Tips

You likely know how it feels when you discover that your cat has eaten something and you have no idea whether it’s safe. Things that kitties seem quite fond of include plants and flowers, which are common in households. While...

Catster_Are Irises Poisonous to Cats

Do Cats Get Annoyed? 10 Vet-Reviewed Signs & What to Avoid

Cats can get annoyed just like humans, although they usually express it differently than us. Even the most loving and content feline can experience annoyance. It is one of the many emotions cats can feel. A cat will show clear...

An annoyed cat or angry cat with a ball toy.

Why Do Cats Rub Their Face on Corners? 5 Vet-Verified Reasons

Cats often engage in behaviors that leave us feeling puzzled or confused. Even though we might find them to be strange, many of these behaviors are normal for cats. New cat owners may be surprised by just how much their...

Tricolor ginger white and back cat rubbing his cheek against the garden corner table

Is Lavender Toxic to Cats? Vet-Reviewed Important Facts & FAQ

Lavender, in its various forms, is one of the most popular substances on the planet. As a plant, its beautiful purple flowers and nice fragrance make it a great addition to any home. Lavender extracts are also used as a...

Catster_Is Lavander Toxic to Cats

How to Trim a Cat’s Nails (Who Won’t Cooperate): 12 Vet-Approved Tips

Trimming a cat’s nails can be an important part of feline maintenance. Cats use their claws for hunting, defense, and balance. While they do scratch them against abrasive surfaces like trees, fences, walls, and even scratch posts, they may still...

trimming nails of cat

Does Your Cat Need A Friend? How to Tell If Your Cat Is Lonely

Cats have a reputation for being perfectly happy on their own – independent, self-sufficient, and solitary. But, like many stereotypes, this one does not tell the whole story. Whilst felines don’t tend to be as gregarious as dogs, they do...

two-cats-lying-on-a-bed-sleeping

Love Cats? So Do We! Join the Catster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Catster Email Newsletter

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.