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.

6 Signs You Need to Change Your Cat’s Food: Our Vet Explains

Share

a man feeding his domestic cat

As a cat owner, you want to provide your feline friend with the best nutrition to keep them healthy and happy. But just like people, your cat’s nutritional needs will change throughout its lifetime.

There are several possible reasons, such as age, health issues, or a food allergy. In this article, we’ll look at instances or signs that it may be time to change your cat’s diet.

divider cats oct 2024

Is Changing a Cat’s Diet Ever Okay?

Generally speaking, changing your cat’s diet isn’t a big deal as long as you’re mindful of the following key points:

  • The diet you’re changing to should be complete, nutritious, and appropriate for your feline
  • The dietary change should be done gradually
  • Your cat should be closely monitored through the transition phase to ensure that they’re adjusting to the new diet well

In other cases, changing your cat’s diet might not be an option, but rather a necessity. We’ll discuss some of these scenarios next.

divider cat faces 2 oct 2024

The 6 Instances When a Dietary Change is Necessary

In some instances, a dietary change might be something a veterinarian would advise for your cat. These changes might either be temporary or permanent. Examples of such instances include the following:

1. Your Kitten is Growing Up

As kittens age, their nutritional needs change. Kittens require food that’s high in energy (calories) to facilitate proper growth and development. Adult cats on the other hand require nutrition to maintain health. Senior cats often have different dietary needs than adult cats

kitten eating from elevated food bowl
Image Credit: Inna Astakhova, Shutterstock

2. Your Cat is Pregnant or Lactating

If your female cat is pregnant or lactating, she will need a diet that’s different from an adult’s cat. Most vets recommend slowly transitioning pregnant or lactating queens to a kitten’s diet because of the metabolic demands of both these biological processes.


3. Your Cat Has a Food Allergy or Sensitivity

Food allergies can sometimes set in later in life, and food or an ingredient that your cat was previously used to might not longer be appropriate for them. The vet may transition your cat to a hypoallergenic diet, or a new diet which is free of any ingredients that your cat is allergic to.

cat scratching skin
Image Credit: rihaij, Pixabay

4. Your Cat Has a Medical Diagnosis

Sometimes, a diagnosis may require a long term dietary change. For example, your cat’s diet might be changed if they are diagnosed with feline diabetes. At other time, the presence of stones in your cat’s urinary system may warrant a transition to a renal diet. Such diets are often termed as prescription diets. As the name suggests, these are prescribed by a veterinarian.


5. Your Cat is Hospitalized

If your cat has an unexpected need for hospitalization, a vet may temporarily place them on a diet different than the one they’re fed at home. Such diets are called recovery diets. These diets are highly digestible and very nutrient dense. Veterinarians use these diets when they feel your cat would benefit from small yet nutritious morsels to facilitate their recovery during their stay at the hospital.

Sick cat, IV, dehydration, dropper
Photo Credit: Vladimir Gudvin, Shutterstock

6. Your Cat Had a Medical Procedure Which Requires a Dietary Change

Sometimes, your cat might have their diet changed if they’ve recently undergone a procedure which requires a dietary adjustment. For example, if your cat had several dental extractions, a vet may recommend a fresh food diet over a kibble diet. Likewise, if your cat had an unfortunate accident and underwent orthopedic repair for their jaw, a vet might prescribe a diet in the form of a slurry, so that your cat has an easier time eating their food.

divider single cat paw oct 2024

Signs to Watch Out For

At times, your cat may be showing some signs that you should keep an eye out for. These signs may indicate an underlying health issue, which warrant veterinary attention. As part of the treatment process, a dietary change might be recommended by a veterinarian.

Signs to Watch Out For
  • They’re changing life stages
  • Your cat seems lethargic all the time
  • Your cat refuses to eat
  • Your cat’s tummy is constantly upset
  • Your cat’s coat looks dull
  • Your cat is suddenly gaining or losing weight

As mentioned before, cats need different types of food for each stage of their life. Kittens and pregnant or lactating cats require the most calories to support their high metabolic demands. Likewise, senior cats may need food that can support a health condition they’ve been diagnosed with, such as arthritis. Though a life stage change isn’t a sign of illness or disease and is something all cats go through, it is advised to work closely with your veterinarian to ensure that your cat’s nutrition is appropriate throughout their life.

divider cat paws 2 oct 2024

How to Pick Your Cat’s New Food

Ready to start shopping for your cat’s new food? Use these tips for choosing the best cat food:

1. Get recommendations from a vet

This is usually mandatory if you need to change your cat’s food due to health reasons like allergies or disease. Even if your cat doesn’t have a medical need for a dietary change, it’s still best to consult with the veterinarian before you change your cat’s diet to ensure that the new diet you select is appropriate for your feline.


2. Choose a protein-rich cat food

Cats are obligate carnivores and can’t effectively synthesize a key nutrient: taurine. This amino acid can only be found in protein from animal sources such as beef, chicken, pork, and fish. When choosing a new cat food, go for low-carb, high-protein brands.


3. Consider what your cat likes

Does your cat prefer kibble, wet food, or a combination of the two? Factor in your cat’s preference when shopping for their new food – you want them to enjoy it as well!

old black and white cat eating
Image Credit: Elizabett, Shutterstock

4. Look for compliance stamps or statements

A quick and easy way to identify nutritionally-balanced cat food is by checking for a nutritional adequacy statement on the packaging. The boards that govern these standards vary by country. In the US, these standards are set by AAFCO. In Europe, they are set by the FEDIAF.

divider cat paw scratch oct 2024

How to Switch Your Cat to Their New Food

Changing your cat’s diet should be a gradual transition. Their sensitive stomachs need time to adjust to the new food, especially if it’s a completely different formulation.

Otherwise, you risk upsetting your cat’s tummy and turning them off the replacement food. Use these tips for a safe transition:

Buy small bags first: As creatures of habit, cats don’t enjoy changes to their routine and that includes their food. So don’t buy a giant 20-pound bag of the brand just yet. Get a smaller pack, just enough for the transition period. This way, you can explore more brands without wasting money.

  • Begin by mixing a small portion of the new food (about 10%) with a very large portion of your cat’s usual diet (90%) for one or their daily meals.
    Observe for a period of about 2 days. Pay close attention to signs of digestive distress, such as diarrhea, constipation, bloat, flatulence, or vomiting. Also, pay attention to your cat’s grooming habits; irritation caused by a dietary change might sometimes be itchy, and your cat might groom more intensely or excessively if their bodies don’t agree with a new diet.
  • If your cat seems fine for a day or two, you can use the same ratio for all meals your cat eats in a 24-hour period. Again, observe your cat for a period of about 1-2 days after you do so.
  • If your cat seems to be tolerating their new food well, you can gradually increase the ratio of their new food and decrease the ratio of their old food as follows:
Days 6–8: 75% old food, 25% new food
Days 10-12: 50% old food, 50% new food
Days 12-14: 25% old food, 75% new food
Day 14 onwards: 100% new food

Monitor your cat’s reaction: Keep a close eye on your cat’s eating habits, behavior, and stool consistency during the transition. If your cat experiences any adverse reactions, such as vomiting, diarrhea, or total refusal to eat, stop feeding them the new food and consult your veterinarian for guidance.

If your cat seems to be showing signs of digestive distress at any point during the transition process, you should revert them back to their old diet and have them inspected by your veterinarian. “Diet hopping”, a process where transitions are stopped halfway and replaced with a brand new dietary transition, is not recommended. Though they are often well-intended, they may result in more harm than good, and your cat may end up feeling worse.

divider cat paws oct 2024

Conclusion

Cats often go through several dietary changes throughout their life. Most of these changes are fueled by the natural changes in their metabolic demands. At other times, these changes are warranted due to health reasons.In some instances, a dietary change many only be temporary. In other cases though, it may be a long term change.

Keeping an eye on your cat’s general health and their eating habits may offer clues when it comes to determining if dietary changes are needed. Your veterinarian can help confirm your suspicions for a dietary change. Transitioning cats to a new food or diet is a process that should be done with patience and a good deal of observation to ensure that your cat handles the change well and that their body agrees with it too.

Sources

Featured Image Credit: Jaromir Chalabala, 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

When a Cat Becomes a Water Fountain – Why Cats Vomit After Drinking

Seeing a cat drink water and then promptly bring it back up can be confusing. Sometimes the explanation is fairly simple, particularly if...

Chatting About Sleeping Positions, Loafing & Cats in Tubes | Chatty Cattys, Episode 33

In this episode of Catster’s Chatty Cattys podcast, Dr. Karyn and Nicole dive deep into the fascinating world of feline sleep behaviors. From...

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...

More related

Exotic Shorthair Cat vs Persian Cat: Key Differences (With Info & Pictures)

Exotic Shorthairs and Persians are often confused with one another. The reason is that the breed standards for both cats are nearly identical,...

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...

Why Do Cat Eyes Glow in the Dark? Vet-Reviewed Feline Anatomy Facts

If you have ever been a cat owner, then you have likely been surprised walking down the hallway and seeing a pair of...

Catster Photo Contest: Cats of the Week Winners (July 17, 2025)

Every week our team gets the privilege of sorting through our readers photos to choose what cats will win this weeks contest! See...

Keep reading

9 Best Cat Shampoos for Dandruff in 2026 – Reviews & Top Picks

While it’s an almost universal truth that shampooing your cat is not high on the list of fun activities, sometimes it can’t be avoided. If your cat has dandruff, they’ll be feeling itchy and scratchy. Choosing to bathe them using...

grey cat bath shampoo bubbles

Can Cats Eat Twizzlers? Health Risks & Precautions

Twizzlers, the colorful little candies that come in various shapes and flavors, are often enjoyed by humans. However, many cat owners wonder whether their feline friends can enjoy them too. Are cats supposed to eat Twizzlers? Are they healthy for...

Catster_Can Cats Eat Twizzlers_v1_Dec 4 2024

Can a Cat Sense Fear? Vet Reviewed Answer

We all know that cats do an excellent job of comforting us when we’ve had a rough day. All we need is to sink our fingers into their soft fur and feel their purr rumbling under our hands to feel...

white cat under the bed

How to Travel With a Cat: 14 Vet Approved Tips & Tricks

Traveling with a cat can be rewarding, but it requires thorough planning. Whether you’re getting ready to drive a short distance and hang out with family or fly somewhere for a relaxing vacation, there are a few factors to consider...

A bengal cat inside a carrier beside some suitcases

Why Does My Cat Pee on the Floor? 7 Vet-Reviewed Reasons & Care Tips

While it is annoying to have your cat pee on the floor in your house, it is not entirely unheard of. Many things can cause a cat to do this, and identifying the cause of this behavior is necessary in...

cat looking a pee on the floor

Cat Grass vs. Catnip: Vet-Verified Differences

Sure, all cat owners—and even those without cats—have heard about catnip. It has been a staple in the cat world for what seems like an eternity. Once upon a time, it was even believed to help humans with ailments. You...

Cat Grass vs. Catnip

Why Are Cats Weird About Water? 5 Reasons Why Their Behavior Is Strange

Cats seem to have a complicated relationship with water. They may hate getting baths, but they’ll still have fun playing with water running from the faucet. Some cat breeds are even known to enjoy swimming. While we don’t know exactly...

blue tabby maine coon cat playing with water coming out of a garden sprinkler

Do Female Cats Spray? Vet Approved Facts & FAQ

It’s a common misconception that only intact male cats spray. The truth is spraying is not a sex-specific feline behavior. Female cats can and do spray. Having a female cat that sprays at home can be frustrating, especially if you...

a white cat spraying the wooden gate

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.