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.

It’s Crunch Time, Cyril: A Weight Loss Journey (Part 1)

Share

We are not amused

Hi, I’m Dr. Karyn! Read my introduction to learn more about me and meet my five hilarious cats: Clutch, Cyril, Alex, Zelda, and Zazzles.

I have to stop making excuses. Calling him squishy and cuddly does not change the fact that Cyril is overweight, and it’s up to me to do something about it. One could easily accuse me of being a pot calling the kettle fat, and they’d have a fair point, but this isn’t about me. It’s about Cyril and his love affair with food.

Cyril eying off my mother's lunch
Cyril eying off my mother’s lunch

Cyril ❤️ Food

I get the impression that someone once told Cyril that being fat is what happens when you eat too much food and lounge around not exercising. So, from a very young age, he had a goal. He would become fat. No food could be left unattended, no cakes left out to cool, and our meals were eaten in a state of constant vigilance. It is because of Cyril’s voracious appetite that we came up with the idea of scatter feeding. If food was set out in bowls, Cyril would start on his, then steal mouthfuls from everyone else’s before returning to his own. Annoyingly, he had won the hearts of all the other cats and they just let him do it! Getting rid of the individual bowls and spreading their food over a larger surface stopped Cyril from being able to steal mouthfuls of food and kept all the cats at a similar eating speed.

This approach has been successful in maintaining the status quo, and Cyril hasn’t put on any more weight, but he certainly hasn’t lost any, either. At 6.6kg (14 1⁄2 lbs), and a Body Condition Score (BCS) hovering around 7-8, it is time for Cyril to shed some pounds – 4, to be exact. Being a larger-framed feline, he should ideally weigh between 4.5kg and 5kg (10-11 lbs). So now that we have a goal, we need to make a plan.

Cyril’s Weight Loss Plan

Showing Cyril the Hard Truth
Showing Cyril the Hard Truth

Losing weight is all about being in a calorie deficit – burning more energy than you put in. Simple, right? The trouble is, just like with humans, what works for one doesn’t necessarily work for all. Take our ginger cat, Alex, for example. Alex is two years younger than Cyril, is of a similar body height and length, has very similar exercise habits, and shares Cyril’s love of food. However, Alex’s BCS is around 5-6. Genetics and individual variation in metabolic rate can have a significant impact on how the body uses, loses, and stores energy, so it’s not necessarily as simple as just feeding Cyril less; I have to feed him differently.

The majority of my cats’ diet is dry kibble, which I confess, is largely because it makes feeding five cats much easier and more affordable. One downside to scatter feeding is that I can’t be certain how much each cat is consuming. However, the amount put down is less than the overall daily recommended amount, so I know that Cyril can’t be consuming significantly more food than the others, and I’m not convinced that simply separating him and feeding him less food is the right approach. He already looks for extra food between meals, and this will only get worse if I reduce his portions.

It was time to switch things up a bit.

Cyril’s current food consists mostly of a veterinary brand food for gastrointestinal health and hairball reduction, and it contains more carbohydrates than he really needs. In theory, carnivores like cats don’t need to consume any carbs, but dry cat foods include it to:

  1. improve stool quality and prevent constipation
  2. reduce costs

For Cyril’s new and improved diet, I am switching him to wet and dry formulations of Wellness Core, which are lower in fat and carbohydrates and contain more ‘whole meat’ ingredients, with fewer fillers and by-products. And unsurprisingly, all the cats LOVE it!

To start with, I will be feeding Cyril the recommended portions for a 5kg cat, then reducing after 2 weeks to a 4kg cat. The plan will be to stick to that amount until we reach his goal weight, then maintain him on a 4.5kg portion long term, making adjustments if needed.

Old Dry Food New Dry Food
Protein 36% 38%
Fat 14% 13%
Carbohydrates (Fiber) 7.4% 4.5%
Main ingredients Dehydrated poultry protein, wheat gluten, rice, vegetable fibres, maize, animal fats, Chicken 54% (Fresh Chicken 16%, Dried Chicken Protein 16%, Dehydrated Chicken 15%, Chicken Fat 4%, Hydrolysed Chicken Protein 3%), Peas 15%, Dried Potatoes, Dehydrated Turkey 4%, Beet Pulp 4%,
  Old Wet Food* New Wet Food*
Protein 8% 7%
Fat 5.6% 5.4%
Carbohydrates (Fiber) 0.24% 0.1%
Main ingredients Poultry by-products, chicken meat, maize flour, pork blood products, corn starch mixture Chicken Broth, Chicken 25%, Chicken Liver 6%, Potato Starch

*Figures are based on ‘as fed’ values, not dry matter measurements

Zelda, Clutch, Cyril and Alex enjoy a meal, whilst Ned and Fred look on sadly
Zelda, Clutch, Cyril and Alex enjoy a meal, whilst Ned and Fred look on sadly

Exercise

As you probably already know, it’s really hard to make a cat exercise, particularly indoor cats. It’s easy to take your dog for a run or a swim but not as straightforward with cats. Even those cats that walk well on a harness are usually the ones setting the pace, not their humans. Although I try not to rely on laser toys, in Cyril’s case, I decided to make an exception. He enjoys chasing the little dot but doesn’t become obsessed. I had to lock Alex away as I didn’t want him falling off the wagon.

Cyril and I committed to a 5-minute session twice daily, which was just enough to get him really moving without running out of puff. After all, I didn’t want him to overdo it and injure himself!

Exercising, appropriately, in the exercise room
Exercising, appropriately, in the exercise room

No Excuses

Now that we’ve told the world about Cyril’s weight loss plan, we are committed! And I am optimistic about our success. Click here to read my six-week update on our progress!

dr.karyn signature

This article is a part of Dr. Karyn's series with her five hilarious cats.

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

Life Through Minnie’s Eyes: The Cat Behind the Comics

I used to volunteer at a small local cat shelter called Little Flower Rescue. I had actually met another cat, Sylvia, whom I...

The Original Space Invaders – Why Zero Respect for Personal Boundaries Is a Good Thing

Cats have a reputation for being independent, and in many ways they are. But anyone who has tried to work at a laptop...

How Cats Are Helping to Cure Cancer

When most people think about medical breakthroughs, they picture scientists in laboratories and clinical trials involving human patients. Few would imagine that the...

Ask Dr. Paola – My Cat Loves Eating Grass, But It Makes Her Vomit! (June 29, 2026)

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

More related

Tonkinese Cat Health Problems: 7 Vet-Reviewed Concerns

Tonkinese cats are known for their beautiful coats and pleasant personalities, but that’s no guarantee of health. Although Tonkinese cats are healthy, they...

Why Won’t My Cat Drink Water From Their Bowl? 6 Vet-Reviewed Reasons

Cats are notorious for not drinking enough water. You also may notice that your cat prefers to drink from other locations than the...

Should I Leave a Light on For My Cat? Vet-Approved Care Facts

Cat owners want to do everything they can to ensure their cats are comfortable, safe, and happy. Knowing that cats get up and...

Why Is My Cat Keeping One Eye Closed? 4 Vet-Reviewed Reasons & Tips

While it may be a cute idea to think your cat winks at you, a cat with one eye closed may be a...

Keep reading

My Cat Stopped Grooming: Vet-Reviewed Reasons & Advice

As cat owners, we want to ensure that our pets are happy and healthy. Grooming is a common behavior for cats, and they can spend a significant part of the day grooming themselves, so when they suddenly stop, it can...

bengal cat grooming itself

12 Vet-Approved Tips That New Cat Parents Should Know About Feline Health

If you’ve recently adopted a cat, you may wonder how to ensure your new companion stays healthy so you can enjoy years of happiness together. There’s plenty of feline health information for new cat parents to become familiar with, but...

veterinarian doctor holds cat

How Often Should You Change the Water in a Cat Water Fountain? Vet-Verified Facts & Care Tips

If you struggle to get your kitty to drink water, you may have purchased a cat water fountain to encourage them to stay hydrated. The constantly running water may be more appealing to your cat than a bowl of water....

Hepper Water Fountain - Himalayan Persian White

Do Feral Cats Know How to Purr? Vet-Approved Facts & FAQ

Hearing your cat purr is usually a sign you’re doing something right. Whether they have a full belly and are thanking you, or they are simply enjoying the affection you’re providing, their contentment is heartwarming. But have you ever wondered...

Stray cats eating on the street

6 Best Online Vet Services in 2026 – Reviews & Top Picks

Veterinary care has come a long way over the years. The pandemic propelled telemedicine for people and pets. It allowed everyone to have access to care without the risk of getting sick, all from the comfort of our own homes....

woman holding out her phone to a cat

How to Tell if a Mother Cat Has Abandoned Her Kittens: Vet-Reviewed Facts & FAQ

Although it doesn’t happen too often, after giving birth, a mother cat may refuse to care for a particular kitten in her litter, whether it’s because she thinks they’re sick or weak or due to another reason. She may even...

abandoned newborn kittens

Rescue Cat Behavior: Vet-Reviewed Problems & How to Help

Rescue cats often make wonderful pets, but while many quickly adapt to their new environment, some may exhibit certain behavioral challenges. Understanding and addressing these common problems can help improve the bond between you and your new pet. Here, we...

a sad cat inside a cage

Can Two Female Cats Get Along? Vet-Verified Info & Introduction Tips

If you already have a female cat at home and are considering adopting another cat, you may wonder how to make the transition as smooth as possible for your furry family member. Would your cat be happier with a male...

Can Two Female Cats Get Along

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.