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.

How to Put a Cat on a Diet: How, Why & 4 Vet-Approved Steps to Follow

Share

grey domestic hungry cat

As you may or may not know, cat obesity is a problem in the United States, so much so that up to 63% of cats are deemed overweight 1. If you have an overweight cat, helping your cat shed that extra weight will reduce their risk of certain diseases and help them feel better. Heavier cats tend to be less energetic and may tire more easily.

In this guide, we’ll list four steps to follow to help your cat lose weight for a healthier, longer life. Without further ado, let’s get into it.

divider cats oct 2024

Why Should My Cat Lose Weight?

Cat obesity increases the risk of them developing diabetes, arthritis, joint issues, and even cancer—all the more reason to put your cat on a diet before disaster strikes. But how do you help your cat lose weight? Fortunately, it’s not too hard; all it takes is a commitment to feeding the right food and quantity, adding more exercise for your feline, and enlisting the help of a veterinarian.

Before we begin, we must emphasize never putting your cat on a diet without the veterinarian’s consent.

woman holding her cat in vet clinic
Image Credit: Vladeep, Shutterstock

How Do I Know My Cat Is Overweight?

If you suspect your cat is overweight, a trip to the vet for an exam is warranted. A vet can determine if your cat is overweight in the first place and then go from there. Sometimes, it’s obvious a cat is overweight just by the mere size of the cat. If you can’t feel your cat’s ribs with your hand, your cat is overweight.

If you have a short-haired cat, try standing over your cat while they’re standing and look for an indention where the waistline should be. If you can’t see the waistline or if the sides are bulging, your cat is likely overweight.

If you look at a body condition score chart, you should be able to see where your cat fits.2 A body condition score of 5 is ideal, while cats scoring 7 and above are very overweight.

Cat Body Condition Score Healthy Weight
You are free to use this image but we do require you to link back to Catster.com for credit

divider cats oct 2024

A Step-By-Step Guide for How to Put a Cat on a Diet

1. Choose Cat Food for Weight Loss

Choosing the right food for cat weight loss is instrumental to success, and this is where the veterinarian will come in significantly. In theory, the fewer calories taken in and the more calories burned equates to weight loss, but for cats, it’s not that easy.

If a cat does not eat for a few consecutive days, the cat is at risk of a life-threatening condition called hepatic lipidosis, also known as fatty liver syndrome. Rapidly changing the diet may lead to your cat not eating, so it’s important to do this gradually, which we will discuss later. In addition, calories should not be immediately drastically reduced.

Before changing your cat’s regular diet, a vet may recommend a few tests. The veterinarian may suggest a cat food high in fiber, low in fat, high in protein, or low in carbohydrates.

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


2. Aim for Slow Weight Loss

When it comes to weight loss for your cat, it should be done at a certain pace. Cats should not lose more than 1% to 2% of their total body week per week. That said, it should be done in a gradual process, which your vet can assist you with. Calorie intake and portion sizes are both pivotal points in a cat’s weight loss, and your vet can guide you in how to calculate how much weight your cat is losing per week.

Adjustments may be in order if your cat is losing too much too fast. For example, if your cat is losing more than 2% per week, your vet may suggest increasing the caloric consumption by 10%. If the weight loss is less than 1% per week, calorie consumption may be reduced by 5% to 10%.


3. Feed the Correct Amount of Food

Portion size is critical in weight loss for your cat. If you are used to feeding your cat with the free-feeding method, meaning leaving food out all day and night for your cat to eat whenever they feel like it, that will need to change. Cat’s prone to overeating will not lose weight when free fed. Ideally, it’s a good idea to provide your cat with smaller, more frequent meals to help control hunger. Your vet can help you determine how much and how often to feed your cat for weight loss. Most cat food will come with a feeding guide of how much your cat should eat however, it is important to remember two things;

  • This is only a guide and there is a lot of individual variation of calorie requirements.
  • For weight loss your cat must be in a slight calorie deficit, while the feeding guides are designed to maintain body weight.

tabby cat eating on metal bowl
Image Credit: Krakenimages.com, Shutterstock

4. Cut Back on Treats

Your cat may not like you very much for this one, but cutting back on treats or even cutting treats out altogether may be needed, depending on your cat’s weight and situation. Commercial cat treats are often high in calories and may contribute to the problem.

As a rule, treats should not exceed 10% of your cat’s calorie intake, and 5% is really what you should aim for when offering your cat treats, even if your cat is not overweight. Remember, fewer calories in and more being burned results in weight loss, while excessive or extra calories will result in weight gain.

Your vet may suggest avoiding commercial treats. Unlike cat food, cat treats are not complete and balanced, and feeding too many may cause a nutritional imbalance.

divider cats oct 2024

How Should I Introduce New Food?

When introducing new food to your cat, the transition should be done gradually over a period of 3 weeks. It’s best to offer small amounts of the new food in a separate bowl; however, if your cat is a fussy and finicky eater, it may take 2 to 3 weeks for your cat even to try the new food, but be patient.

After your cat starts eating the new food, mix ¼ of the new diet with ¾ of the old food for 2 to 4 days. Next, provide half of the new food and half of the old food for another 2 to 4 days. Lastly, mix ¾ of the new food with ¼ of the old food for another 3 to 4 days. Once this is complete, the transition is done, and you can start feeding the new food exclusively.

If your cat never eats the new food from the separate bowl, contact your veterinarian for advice on how to proceed.

How Can I Incorporate Exercise in My Cat’s Daily Life?

Incorporating exercise into your cat’s daily routine (if they have one) can help with weight loss; plus, exercise is excellent for your cat’s mental state. All cats need both mental and physical stimulation, and you can have fun getting your cat interested in playing with you. Cats are natural predators and have developed into hunters, but many domesticated cats live a sedentary lifestyle in the comforts of the home. However, this doesn’t mean your cat can’t exercise.

Providing your cat with a cat tree is an excellent way to encourage climbing, scratching, and batting, all of which provide exercise. Wand teasers, interactive games, puzzles, and plush toy mice are also excellent ways for you to engage in play with your cat and establish a bond. Cat tunnels are also objects cats are curious about and want to explore, again providing exercise. You can even leash-train your cat so you can take them on walks in a controlled and safe environment.

Catios have become popular in recent years, allowing your cat to explore the great outdoors safely. You can buy one or even make your own for little cost.

divider cats oct 2024

Conclusion

When it comes to putting your cat on a diet, it’s not one-size-fits-all, and that’s why it is crucial to work directly with your veterinarian before doing so. There are factors that may come into play and can influence the correct diet for your particular feline, such as your cat’s age and overall health. Putting your cat on an extreme diet without your veterinarian’s supervision is not advisable.

The key takeaways are to recognize your cat is overweight, consult your vet for diet recommendations, and incorporate exercise into your cat’s daily life. An obese cat will have a higher risk of certain diseases, but you can help improve your cat’s overall health and potentially extend their life by helping them maintain an ideal weight.


Featured Image Credit: Valeri Vatel, 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

Ask Dr. Paola – Help! My Male Cat Gets Into Fights! (March 9, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Why Your Cat’s Poop Smells Like a Biohazard

Nobody enjoys litter box duty, but sometimes it gets unbearable. The smell hits you from across the room. You’re scooping faster, lighting candles,...

RIP Your Furniture? Not With This Guide to Cat Scratch Damage Control

Your couch looks like it survived a minor apocalypse. The curtains have mysterious vertical shreds. That new rug you splurged on is already...

Celebrating 15 Years as the Most Popular Resident of No. 10 Downing Street

For almost 300 years, a rather unassuming Georgian building of black bricks with a shiny black door has been the official residence and...

More related

How to Tell If a Cat Has UTI (Urinary Tract Infection)? Vet-Reviewed Signs

Urinary tract infections (UTIs) are common in cats. They mainly occur when bacteria enter the urinary tract and go up to the bladder1....

Can Cats Eat Cake? Vet-Reviewed Risks & Facts

Cats are adorable. We understand why you’d want to share a piece of cake with your kitty. Since cakes are often found in...

Can Cats Eat Horseradish? Vet-Approved Nutrition Facts

While we pet parents may want to let our cats eat everything that we do, it’s just not feasible or even safe for...

Why Is My Cat’s Nose Running? Our Vet Explains 12 Possible Reasons

Oh, no! Your cat’s nose is running. We never like to see our furry family members unwell, so let’s look at some of...

Keep reading

How Long Should You Play With Your Cat? Vet-Verified Facts & Tips

Cats need exercise in order to be at their healthiest. That’s a fact that we’re sure you know if you’re a cat owner, however, you may not always know how long you should be playing with them or even how...

cat playing with owner

How Do Cat Microchips Work? Vet-Reviewed Facts & FAQ

Microchips are undoubtedly incredibly useful for our pets. They’re tiny but contain information about our animals in order to identify them and make it easy for us to be reunited with them if they ever got lost. The microchip conveys...

vet microchipping a cat

Why Is My Cat Bobbing His Head? 6 Vet-Verified Reasons for This Behavior

Head bobbing in cats can occur for a variety of reasons, some simple and others more serious. In many cases, your cat’s head bobbing may simply be the symptom of a benign, temporary anomaly, like a stressful situation or overheating....

woman hands pet and massage on the head of gray and white adorable cat

Outdoor Plants That Are Toxic to Cats: 10 to Avoid (Vet-Reviewed)

Cats are curious creatures and will often show interest in plants, grasses, trees, and dangling leaves. However, it’s important to be informed on this topic of greenery in your garden. A quick lick or nibble can result in your pet...

Wisteria plant

Cat Nails Splitting? Vet Approved Facts & Recommendations

Cats shed the outer layers of their nails regularly. They will usually remove the outer layer by scratching on something and leaving a little claw-shaped nail behind, revealing the shiny and sharp new claw underneath! Some cats will keep their...

Close up cat paws

Can Cats Eat Chicken Noodle Soup? Vet-Reviewed Facts & Risks

Simple to digest and soothing to the throat, chicken noodle soup has been touted as the remedy for a variety of ailments in humans. Cats naturally love chicken, so they may be drawn to the soup regardless of its supposed...

Can Cats Eat Chicken Noodle Soup

Can Cats Eat Spoiled Meat? Vet-Reviewed Facts & FAQs

Cats are obligate carnivores and therefore predominantly evolved to eat meat in their diet. Many owners tend to favor feeding high-quality cat food—only to see them snatch not-so-fresh meat out of the garbage. But can cats eat spoiled meat? No,...

Can Cats Eat Spoiled Meat

Why Does My Cat Put Her Bum Up? 6 Vet-Verified Signs a Cat Is in Heat

If your female cat has been behaving strangely (such as raising her bum), she may be in heat. Unspayed female cats usually experience their first heat around the age of 6 to 9 months, but it can happen earlier as...

a hand scratching cat's butt

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.