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.

Can Adult Cats Eat Kitten Food? Vet-Verified Facts & FAQ

cat and kitten eating in one plate

You already know it is important to feed your kitten age-appropriate food, but what if you accidentally feed kitten food to your adult cat? Can adult cats eat kitten food? Yes, you can feed kitten food to your adult cat; however, only under specific circumstances. If you want your cat to live a long and happy life, you must understand the specific dietary requirements your pet needs. In pursuing that knowledge, pet parents often discover that the food they feed their furballs changes over their lifespan.

For example, kitten food is recommended for cats up to the age of 12 months (24 months for Maine Coons), upon which you have to switch to a food formulated for adults. Why is this the case, and why would giving kitten food to an adult cat is a bad idea?

Here is everything you need to know.

divider 1 paws

The Differences Between Kitten and Adult Cat Food

Adult cat food and kitty food are formulated differently since they serve the needs of different physiologies. The following are the main differences between them:

1. Number of Calories

Kitten food contains more calories than adult cat food. This is because kittens are still growing, and there is more going on in their bodies than mature cats. As such, they have a higher energy requirement.

Additionally, it does not help that kittens are endless balls of energy, burning through calories rapidly. They must consume a lot of food to avoid a calorie deficit, which can compromise their well-being. However, their tiny stomachs cannot allow them to hold down a lot of food. Therefore, the solution to that problem is to make their food as calorie-dense as possible.

On the other hand, adult cats do not have any more growing to do. Therefore, their food is strictly for maintenance purposes, and mature cats are not as playful as kittens, meaning they do not expend as much energy. They do not need nearly as many calories in their food as kittens. You have to remember that any unused calories are converted into fat. So, if your adult cat eats kitten food it can promote unhealthy weight gain due to it being so high in calories.

However, pregnant cats should be on a high-calorie diet to take care of their unborn babies. The average adult cat requires 50–70 calories per 2.2 pounds (1 kg) of their body weight every day to remain healthy. An experienced veterinarian should help you determine your cat’s ideal daily calory requirements.

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. Amount of Protein

As is the case with calories, kittens also require higher levels of protein in their food to facilitate the tissue-building process. That is why commercial kitten food has a much higher protein content (35%–50%) than adult cat food (25%–40%).

norwegian forest cat eating cat food from a bowl
Image Credit: Astrid Gast, Shutterstock

3. Fats and Fatty Acids Content

Unlike dogs, cats are obligate carnivores; they eat meat and meat products exclusively. This can make it difficult for a pet parent to ensure their cat gets all the necessary nutrients from their food. This is especially true when it comes to fats and fatty acids. Since cats do not consume starch, they need high amounts of dietary fat in their food for energy.

Kittens, especially, need much higher amounts of fats in their diet due to how active they are. Fatty acids, on the other hand, are crucial for optimal growth and development. They also support organ functions. As a result, kitty food has a higher fat and fatty acid content than adult cat food.

Get Free Cat Food Recall Alerts!

Your cat’s health matters. Get instant notifications about cat food recalls here


4. Minerals and Vitamins

Regardless of age, any cat requires a healthy amount of minerals and vitamins to stay healthy. Nonetheless, kittens require almost twice as much phosphorus and calcium to facilitate the process of bone-building. That is why kitty food has higher levels of these minerals than adult cat food does.

cat food in red bowl
Image Credit: Africa Studio, Shutterstock

divider 1 paws

Can Kitten Food Be Beneficial to Adult Cats?

After comparing the nutritional profile of kitten food to that of adult cat food, it would seem like an adult cat has no business eating kitten food. However, there are certain times when an adult cat can eat kitten food and receive its benefits.

When adult cats become seniors (past the age of 11 years), they become susceptible to a number of diseases, some of which cause a decrease in their appetite, hence resulting in weight loss. If your senior cat is losing weight due to a lack of appetite, you should consider giving them kitten food. The benefit of kitten food is that the cat does not have to eat much of it to meet its daily caloric requirements. Also, you will not have to force-feed the cat.

Additionally, cats find it extremely tasty, thanks to the fatty nature of kitten food. The taste alone will be enough to get your senior cat eating again, and the same goes for choosy cats. True to their feline heritage, some cats will not eat food that does not interest them, which might cause them to lose weight. If that is your cat, consider using kitten food as a temporary solution since they cannot resist it.

Nonetheless, before getting your senior cat on a kitten food diet, make sure that you have consulted with your vet.

While many kittens grow out of the essential supplies you buy for them when they are young, finding a product that can last them a lifetime is like hitting the cat jackpot - which is why we love the Hepper NomNom Cat Bowl so much. Its unique cat-inspired design offers dual, stainless steel bowls that are wide and shallow, crucial for neck support when kittens are little and benefits mature cats by offering whisker relief. If you want to learn more about what other advantages the NomNom will provide for your growing kitten, click here.

Hepper NomNom - Spill Proof Elevated Cat Bowl
  • NO MESS - The 360° tray on this cat food and water bowl set has a raised design to catch and...
  • WHISKER FRIENDLY - Shallow and wide metal containers with flat bottoms ensure your kitty can enjoy...
  • CHEW-SAFE MATERIALS - Kittens and cats love chewing on silicone and soft rubber - but it's a choking...

At Catster, we’ve admired Hepper for many years and decided to take a controlling ownership interest so that we could benefit from the outstanding designs of this cool cat company!

divider 2 cats

How to Introduce Kitten Food to an Adult Cat

If you decide that kitten food or treats could do your adult cat good, introduce it gradually to them. Restrain from abrupt changes, as they can cause gastrointestinal problems thanks to the sudden calorie increase.

The best way to transition is by mixing equal parts of their standard food with kitten food. After doing that for about 2 weeks, you can increase the portion size of kitten food while decreasing that of their regular food until their entire meal consists of pure kitten food.

Grey domestic cat being given food in a bowl
Image Credit: Valeri Vatel, Shutterstock

divider 1 paws

Conclusion

Adult cats can eat kitten food. However, it is not recommended since its calorie-dense nature promotes obesity in adult cats. Pregnant or senior cats with appetite issues are the only two groups of adult cats that should be fed a kitten diet. Healthy adult cats should not eat kitten food, and kittens should not eat adult formulations. Before switching your cat’s food, check with your veterinarian to ensure it’s suitable for your pet.

See Also:


Featured Image Credit: Irina Kozorog, 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

The 6 Common Reasons Why Your Cat Guards Your Door

Cats come with all kinds of cute quirks, including their guarding behaviors. As aloof or indifferent as our cats can often appear, it’s...

Can Cats Eat Seafood? Vet Approved Facts & Health Guidelines

It’s a popular belief that cats love fish, even though fish are not a natural part of a feline’s diet. Some cats don’t...

10 Most Affordable Cat Breeds (With Info & Pictures)

There are many different cat breeds out there. While they might not be as well-known as dog breeds, cats can differ quite a...

PawTree Tear & Saliva Stain Remover Chews Review 2025: A Detailed Look

Just about every owner of a light-colored dog or cat knows the struggle with tear stains is real. Often, switching to a higher-quality...

More related

Maine Coon Kittens for Sale in North Carolina: Breeders List 2025

Catster advocates for adopting before shopping, though we fully understand there are many reasons for seeking a breeder. So, we encourage it to...

8 Facts About Cat Scratch Fever: Vet Verified

Cat scratch fever, also known as cat scratch disease (CSD), occurs when a cat infected with Bartonella henselae bacteria bites someone, scratches them,...

How to Clean a Cat Litter Box: Our Vet Explains (With 10 Easy Steps)

Cleaning up after your cat includes keeping on top of their litter box hygiene. Not only does this help control unwanted odors in...

Why Does My Cat Scratch Around Their Food Bowl? 4 Likely Reasons

If you’ve ever had a cat, you know that they can be very particular about their food. They may sniff it, walk away,...

Keep reading

8 Types of Cat Meows and What They Mean (With Videos)

Cats can’t speak to us in our language, which means we need to learn their language if we want to have any hope of figuring out what they’re trying to tell us at any given time. Luckily, that’s easier to...

close up cat meowing

How to Keep Cats Warm in Winter: 7 Vet-Approved Methods

If you own a cat, you might be wondering if they easily get cold. You may have observed them hiding under a blanket, sitting by a heater, or snuggling up with you to stay warm. If you would like to...

Devon Rex kitten on a white fluffy blanket

Can Cats Eat Pesto? Vet-Approved Risks & Safe Alternatives

Pesto is a household staple used in various foods, such as salad dressing, pizza, and chicken—the possibilities are limitless! If you’re a cat owner, you may have noticed your feline nosing around when you bust out this sauce, but is...

Can Cats Eat Pesto

How to Stop Your Cat Begging for Food: 6 Ways That Work

Shadow was a young adult cat when she was rescued by her human, Nikki, from a trailer park where stray and feral cats gathered. Since kittenhood, Shadow lived in the park, scrounging for scraps from dumpsters and begging residents for...

Can Cats Eat Lamb? Vet-Reviewed Pros & Cons

One of the most important things about caring for your feline is ensuring that your furry friend gets proper and adequate nutrition through a well-balanced diet. Cats are obligate carnivores, meaning they require meat in their meals in order to...

Can Cats Eat Lamb

Why Do Cats Chatter at Birds? 5 Possible Reasons & FAQ

Cats are vocally gifted and can produce up to 21 distinct vocalizations.1 Although cat owners are accustomed to their pets meowing, they may be baffled by their chattering. Chattering is a unique sound that cats make after seeing prey, such...

cat and bird

How Do Cats Hunt? Vet-Approved Instincts & Methods Explanation

If you bring a cat into your home, you have to realize you’re bringing a predator right into your living room. While cats don’t go after big game like humans, that won’t stop them from stalking around your home looking...

cat hunting in grass

9 Best Cat Foods for Shedding & Hair Loss in 2025: Reviews & Top Picks

When you first got your little bundle of fluff, you might not have been ready for the shedding and grooming. But some cats, like American curls, shed tremendously, and others exhibit excessive grooming behaviors or develop allergies that lead to...

Hungry cat sitting next to bowl of food at home kitchen and looking at camera