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)

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.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Cat Hotels: What to Expect When Leaving Your Pet

If you are traveling for work or pleasure and have a cat, you have a few options: traveling with your cat, putting them...

My Cat Swallowed a Foreign Object: When to See a Vet

Cats love to play with anything that they can get their paws on, such as buttons, balls of paper, bits of string, threads,...

3 Pet Friendly Hotels in Columbia, SC (2025 Update)

Whether you’re a fan of exceptional cuisine, historic architecture, or quirky landmarks like the World’s Largest Boiled Peanut statue, Columbia has plenty to...

Will Cat Fleas Bite Humans? Vet-Reviewed Facts & FAQs

If your cat has fleas, you may be wondering if the fleas will start to bite you as well. Yes, cat fleas can...

More related

How to Stop Cats From Scratching & Clawing Leather Furniture: 6 Vet-Verified Tips

Of course, you love your cat, but that doesn’t mean you love all of their behaviors–especially the more destructive ones. If your cat...

7 Best Scratching Posts for Large Cats in 2025 – Reviews & Top Picks

Dogs must bark, birds must fly, and cats must scratch. While you adore your kitty for their cuddly demeanor, playful nature, and angelic...

Are String of Hearts Toxic to Cats? Vet-Reviewed Houseplants Examined

If you’re looking to add houseplants to your home, the potential options can be overwhelming. However, if your home already has a cat...

Basepaws Cat DNA Test Review: Pros, Cons, FAQ & Verdict

Have you ever wondered about the breeds that make up your cat? Or wondered what potential health problems your pet might face in...

Keep reading

Can Cats Drink Salt Water? Vet-Reviewed Facts & Advice

We all grew up knowing that we shouldn’t drink salt water. That said, gargling with salt water seems to be a safe practice. It can even reduce tooth and gum pain. But we know better than to swallow the saltwater...

Can Cats Drink Salt Water

Feline Cognitive Decline: Vet-Reviewed Signs, Diagnosis & Treatment

Watching your cat age can be devastating. It’s even harder when you notice behavioral changes taking place that your cat doesn’t appear to have any understanding of or control over. Feline cognitive dysfunction is a common condition that occurs in...

male veterinarian with stethoscope holding striped cat

How Do Cats Give Birth? (Vet Approved Pregnancy & Labor Facts)

It can come as a surprise to find out your cat is pregnant; most likely, you thought she’d only put on a bit of extra weight. You may not be aware of how the process goes or how you can...

A pregnant mother cat while resting on a wooden chair showing its tummy and nipples

The 6 Best Freeze-Dried Cat Foods of 2025 – Vet-Verified Reviews & Top Picks

Freeze-dried cat food is the easiest way to feed your pet a natural raw diet that reflects what a cat would eat in the wild. Commercial wet or dry foods often contain extra carbohydrate-based fillers that provide bulk and calories...

cat eating food

Why Is My Cat Not Drinking Water? Vet-Reviewed Reasons & Solutions

Keeping our cats hydrated can be a bit tricky. Cats are notorious for not drinking enough, so we need to find ways to ensure that they are ingesting enough water to stay healthy. But what if your cat doesn’t seem...

bengal-cat-playing-waterin-the-bowl

Why Does My Cat Bite Their Feet? 7 Vet-Verified Reasons

Cats do all sorts of strange things! The motivations of most feline behavior remain, for the most part, opaque at best, with cat lovers reduced to playing with educated guesses when attempting to explain their pets’ various quirks. They intentionally...

bengal cat biting its paw

Why Is My Cat Panting After Giving Birth? Vet Approved Facts & FAQ

Breeding your cat is a beautiful experience both for you and your cat. And while being pregnant is exciting, giving birth can be challenging for your furry friend, especially if she gives birth to multiple kittens. After giving birth, many...

fluffy cat pregnant give birth and new born baby kittens_iarecottonstudio_shutterstock

Do Long-Haired Cats Need Baths? Vet Approved Grooming Advice

Most felines are notorious for disliking getting wet, so bathing a cat might seem challenging. The good news is that most cats rarely need baths! But what if you have a long-haired cat? With all that hair, do they require...

gray cat newly bathe