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.

When to Switch From Kitten Food to Cat Food? Vet-Reviewed Facts & FAQ

Share

little kitten sitting by a bowl of milk

Cats, like people, have different nutritional and dietary requirements at different stages of life. Kittens have seemingly boundless energy, and they need to consume the nutrients to match this. When they cross into adulthood, they will be burning off a lot less energy but will need to sustain a healthy weight and a nutritional diet. As a senior, your cat will be moving around much less and will need to consume different amounts of food. But these are only very general dietary requirements, and your cat has more specific vitamin and mineral requirements depending on their age.

Read on for more information on just when to switch from kitten to adult cat food.

divider 3 paws

When Does a Kitten Become a Cat?

Kittens are young, playful, and still learning the ropes. During this time, they are very active for a portion of the day but will also need to sleep for long periods. They will be using their brain to learn new behaviors and adopt new skills.

Young kittens are also forging new relationships with their humans and other animals. Once a kitten reaches approximately 6 months of age, they are considered adolescent, so a kitten aged between 6 months and 12 months is more like a teenage child. They will have started to develop most of their skills, they should have a good understanding of what is right and wrong, but they will still have a lot of pent up energy to burn off.

Once they reach 12 months old, a kitten is considered a fully-grown cat, although giant breeds may not have fully developed until they are 18 months old. For a normal-sized house cat, you will be looking to transition from kitten food to adult cat food at 12 months.

cat and kitten playing outdoors
Image Credit: Volodymyr Plysiuk, Shutterstock

divider 3 paws

What Is in Kitten Food?

Kitten food is designed for very young cats, pregnant cats, and nursing cats. Good quality kitten food usually contains at least 55%–60% protein and at least 22%–25% fat, with more of these not being an issue, as kittens need the nutrients and energy to grow and develop, and pregnant or lactating cats need the surplus as well. It has a high fat density, which means that it has a lot of calories in a small amount of food. This caloric density is the reason that adult cats put on a lot of extra weight if they eat kitten food. This is common in multi-cat households where the adult cat eats the kitten’s food, and it should be prevented.

As well as having a higher calorie content, kitten food tends to be packed with omega-3 fatty acids, calcium, and phosphorus. These nutrients help with the development of everything from a healthy coat and skin to strong bones and a healthy brain.

little ginger kitten eats wet food
Image Credit: Elizabett, Shutterstock

Can Kittens Eat Adult Cat Food?

It is not uncommon to hear the myth that kitten food is nothing more than a marketing ploy; the same food as adult cat food but wrapped up in kitten packaging and sold for a higher price.

This isn’t true. Kitten food contains different amounts of nutrients that will help your kitten develop properly and healthily. But can they eat adult food?

Some adult foods are suitable for kittens. Check the packaging, and if it says it is suitable for all life stages, it can make good kitten food. It is considered nutritionally sound for seniors, adults, and kittens.

Otherwise, you should avoid feeding adult cat food to kittens until they reach a suitable age.

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 3 paws

How to Choose Adult Cat Food

There is a huge range of adult cat foods on the market, including dry and wet food. You can even find some freeze-dried raw food ingredients.

Wet food hydrates your cat and provides them with the nutritional content they need. It can be more appealing, too, but it is more expensive, will only stay fresh for a few hours once in the bowl, and has a shorter shelf life than dry food.

Dry food will last longer in the cupboard and the bowl. It is less expensive than wet food, and it can contain all of the nutritional requirements needed. It also smells less and causes less of a mess around the food bowl.

You can also combine dry and wet foods. If you do this, ensure that you only feed half of the recommended amount of each, per day, otherwise, you will be overfeeding and your cat will put on extra weight.

Whatever type of food you feed your cat, remember that cats are obligate carnivores. They would eat meat in the wild, and this is where the majority of their protein should come from. Buy animal-protein-based foods and ask a veterinarian if you need expert advice on the proper food for your cat.

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

How to Transition From Kitten to Cat Food

Moving from kitten to cat food is an important stage in your cat’s life. When changing food for any reason, you should make the transition gradually. This will help prevent stomach upsets and gastrointestinal complaints. Make the transition over two weeks.

Start with about 90% kitten food and 10% adult food. Replace another 10-20% every second day, taking a total of one or two weeks to fully transition. This gives your kitten time to adjust to the new flavors and textures and its digestive system a chance to adapt to the change. From this time, your kitten must be used to eating only two to three meals a day. Avoid getting your kittens into the habit of free feeding. Most adult cats don’t self-regulate very well, so giving your cat two or three portioned-out meals a day can help avoid obesity.

divider 3 paws

Moving from Kitten to Adult Cat Food

Changing from kitten to adult cat food is a major milestone in your pet’s life. It means that they should have settled down enough that they do not need the extra calories and additional energy in their diet. Adult food provides a more suitable calorie ratio and contains life-stage-appropriate vitamins and minerals for your cat. Make the move gradually from kitten to cat food, typically at the age of about 12 months, and choose a good quality food that includes meat-based proteins.


Featured Image Credit: Impact Photography, 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

Rescue Cats Deserve Beautiful Endings

We all know that beauty is only skin deep, and that scars always tell a story, and this is one cat with a...

Ask Dr. Paola – Help! My Cat Gets Diarrhea from Wet Food! (March 23, 2026)

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

Cat Shampoo Alternatives That Are Already in Your House

If your cat has ever gotten into something disgusting and you’ve found yourself without cat shampoo, we’re here to help. Before you panic...

Licky Treats: A Scientific Investigation into the Tube-Based Delights Taking Over Modern Cat Households

By Professor Lucifer Fluffovich, Department of Applied Snackology Human civilisation has produced many inventions of questionable usefulness: vacuum cleaners, pyramids, and the laser...

More related

Celebrate National Adopt a Shelter Pet Day With These Celebripets

You don’t need to look far to find an adopted shelter pet. Reality stars to bona fide rock stars (and everyone in between)...

How to Cat Proof a Toilet Paper Holder: Vet-Reviewed Explanation & Tips

Cats are notorious for unraveling and shredding toilet paper, driving many a cat parent to despair. If your cat is wreaking havoc in...

Why Does My Cat Throw Up After Eating? 8 Vet-Reviewed Reasons & Solutions

If your cat starts throwing up after they eat, it’s obviously very alarming behavior that you want to get to the bottom of...

8 Different Sphynx Cat Colors: Vet-Verified Info & Pictures

While they may not have the luxurious coats of many other breeds, they are born with almost invisible and scarce hairs that lay...

Keep reading

Do Cats Get Annoyed? 10 Vet-Reviewed Signs & What to Avoid

Cats can get annoyed just like humans, although they usually express it differently than us. Even the most loving and content feline can experience annoyance. It is one of the many emotions cats can feel. A cat will show clear...

An annoyed cat or angry cat with a ball toy.

Can Cats Eat Diatomaceous Earth? Vet-Verified Safety Tips & Warnings

Nowadays, we seem to be moving toward natural, organic, and integrative ways to combat disease—not only in humans but also in our kitties. If you have been looking for holistic ways to treat fleas and worms in your cat, you...

Can Cats Eat Diatomaceous Earth

Why Does My Cat Sleep at My Feet? 6 Vet-Reviewed Reasons Behind This Behavior

Cats love to nap, with some spending more than 15 hours per day asleep. But cats can be pretty particular about where they snooze. Most have favorite places they return to over and over when it’s time to get some...

Bengal cat hugging their owners feet to sleep

Is It Normal For Well-Adjusted Cats To Get Into Fights? Vet-Verified Reasons & Solutions

Cat fights can be a serious issue in multi-pet households, both for the pets involved and the humans who love them. Not only can cats sustain injuries during these unpredictable events, but they can also create stressful environments that aren’t...

cat fighting close up

Why Does My Cat Bite My Feet? 6 Vet-Approved Reasons for This Behavior

As cat owners, we know that the price of being owned by a cat also means dealing with a lot of crazy and inexplicable behavior. But this is why we love our cats. Chances are, at some point in time,...

cat biting man's foot

My Cat Ate a Fly: Vet-Verified Dangers & Tips

Cats will chase after and pounce on anything that moves, including small insects. Grasshoppers and flies are popular targets, and they flutter and glide with unpredictable grace full of starts and stops that are the definition of perfect feline entertainment....

My Cat Ate a Fly

7 Best Cat Foods for Persian Cats in 2026 – Reviews & Top Picks

Persian cats may not be known for being excessively energetic or lively. In fact, they’re more likely to be found curled up on your lap than out chasing birds. They can have a playful streak similar to that of a...

persian cat eating dry food

Why Does My Cat Stare at the Wall? Our Vet Discusses Common Reasons & What to Do

There are many things our cats do that confuse and confound us, and one behavior that can be quite concerning is when they start staring intently at a wall. Are they sleeping with their eyes open? Do they see something...

cat staring at the wall

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.