Kittens drink their mother’s milk, or a kitten milk replacer, until about 3 to 4 weeks. They then move to a soft mush of wet kitten food and, by around 8 weeks, to kitten-formulated wet and dry food. Keep feeding a kitten growth diet until about 9 to 12 months, with fresh water. Skip cow’s milk, raw meat and onions.
- Newborn kittens need only mother’s milk or a kitten milk replacer, never cow’s milk.
- Weaning starts at about 3 to 4 weeks with a soft mush of wet kitten food and replacer, and most kittens are weaned by about 8 weeks.
- Choose food labeled complete and balanced for growth or all life stages, not adult food.
- Kittens under 4 months eat 3 to 4 small meals a day; use portions, not constant free feeding.
- Put out fresh water once a kitten eats solid food, and change foods over 7 days.
- Avoid onions, garlic, chocolate, xylitol, raw meat and eggs, alcohol and dairy; ask your vet before adding extras.
Kittens eat very different things in their first twelve weeks. A newborn lives on milk. A four-week-old is learning to lap up a soft mush. An eight-week-old is crunching kitten kibble and licking a plate of pâté clean. Each step matters, because kittens grow fast.
This guide walks through what kittens eat at every age, from the first milk feed to the move to adult food at around a year. It covers weaning step by step, wet food versus dry, what to look for on a label, how often to feed, and the human foods that are not safe. Every claim comes from a veterinary or animal-welfare source, linked at the end. If you want portions for your own kitten, our Kitten Plan builder does the maths for you.
One note before we start: this is research, not veterinary advice. If a kitten is very young, is not eating, or seems unwell, talk to your vet.
What do kittens eat at each age? A quick chart
Sources differ by a week or so on exactly when weaning starts, so treat the ages below as ranges and watch your kitten rather than the calendar.
| Age | What they eat | Good to know |
|---|---|---|
| Birth to about 3 weeks | Mother’s milk, or a kitten milk replacer if there is no mother | Milk is the whole diet. Nothing else is needed. |
| About 3 to 4 weeks | Milk plus first tastes of soft food: wet kitten food, or kitten kibble soaked in water, mixed with a little milk replacer | International Cat Care starts weaning at 3 to 4 weeks. Best Friends starts at 4 weeks. |
| About 5 to 6 weeks | Wet kitten food, with kitten kibble softened or mixed in | Best Friends swaps warm water in for the replacer from week 5. |
| About 7 to 8 weeks | Wet and dry kitten food | Most kittens are fully weaned by about 8 weeks. |
| 2 to 4 months | Kitten food, split into 3 to 4 small meals a day | Merck Vet Manual advises 3 to 4 meals a day under 4 months. |
| 4 to 12 months | Kitten food (a growth diet), with fewer meals as they get older | Keep going until about 9 to 12 months, then switch to adult food. |
Want the full picture of the year? The kitten timeline shows each stage, and our kitten feeding schedule has sample timetables.
Newborn to 3 weeks: milk and nothing else
For the first few weeks a kitten’s food is milk. The mother’s milk is best. The Merck Veterinary Manual says a commercial milk replacer is preferred over homemade formulas when the mother’s milk is not available (Merck Veterinary Manual).
If you are hand-rearing orphans, use a milk replacer made for kittens and follow the tin. International Cat Care says to warm it to about 95 to 100°F (35 to 37.8°C), test a drop on the back of your hand, and never force a kitten to feed, because that risks milk going into the lungs (International Cat Care).
Newborns need feeding round the clock. The two rescue and welfare sources we checked give slightly different schedules, so follow the one your vet or rescue gives you:
How to tell a newborn is eating enough
Weight is the best check. The Merck Veterinary Manual says healthy kittens gain about 50 to 100 g a week (Merck), which matches the 0.25 to 0.5 oz a day that the Humane Society of Charlotte gives for older kittens. Weigh on a kitchen scale and keep a log. Our kitten weight chart helps you read the numbers.
Excessive crying, failing to suck, weakness, feeling cold, milk coming back up, or a kitten lying apart from the litter. International Cat Care warns that kittens can decline quickly.
More on this stage is on our newborn kittens page.
How much should your kitten eat?Get daily calories, portions and a feeding schedule for your kitten’s exact age and weight.
Can kittens drink cow’s milk?
No. It is one of the most common feeding mistakes, and several sources agree:
- International Cat Care says cow’s and goat’s milk have protein and fat levels that are too low for kittens (hand-rearing guide).
- The Purina Institute says kittens lose the ability to digest lactose, so cow’s milk can cause diarrhea (Purina Institute).
- The ASPCA notes that pets do not have enough lactase to digest lactose, so dairy can cause digestive upset (ASPCA).
- Cornell’s Feline Health Center says milk is not generally recommended because many cats are lactose intolerant (Cornell).
A kitten with a mother gets what it needs from her. A kitten without one needs a kitten milk replacer. Once weaned, a kitten needs fresh water, not milk.
Weaning step by step: 3 to 8 weeks
Weaning means moving from milk to solid food slowly. International Cat Care warns that starting too early or switching too suddenly can stress the mother and the kittens (International Cat Care). Here is a gentle method that combines the advice from Best Friends and International Cat Care.
- Start with a flat dish of milk replacer. Use a very shallow saucer so the kitten can lap easily.
- Make a soft mush. Mix wet kitten food with a little warm milk replacer until it is paste-like. Best Friends suggests, for one kitten, about half a can of wet kitten food with a quarter can of formula.
- Put it in a shallow dish and bring the kitten to it. If the kitten does not start, offer a little on a spoon or dab some on its nose so it licks it off. Never force it.
- Offer a little at each feed. Over a few weeks the kitten should eat more food and drink less milk. It may take a day or so before dish-feeding becomes regular.
- Swap milk for warm water in the mush from about week 5. That is the Best Friends approach, as kittens start to eat well on their own.
- Add kitten kibble. Soak it in water until soft at first, as International Cat Care and the Humane Society of Charlotte both suggest.
- Put out water and a litter box. Best Friends leaves a dish of water out from about 4 weeks and introduces a litter box at the same stage. Our litter training guide has the full steps.
Change the dish often. International Cat Care points out that kittens walk through their food. Our weaning guide covers this stage in more detail.
Wet food or dry food: what suits kittens?
Both can work, and the sources we checked do not name a single winner. The VCA hospitals say kittens can eat either wet or dry by 6 to 8 weeks, and that you should switch between them gradually (VCA Animal Hospitals). International Cat Care says offering both helps kittens accept different textures later in life (International Cat Care).
| Wet (canned or pouch) | Dry (kibble) | |
|---|---|---|
| Water content | At least 75% moisture | About 6 to 10% water |
| Hydration | Helps water intake, which is why many vets favor it | Needs a good water supply alongside |
| First weaning food | Easy to mash into a mush | Needs soaking until soft at first |
| Convenience | Should not be left out for long | Can be left out, but free feeding raises overweight risk |
Sources for the table: Cornell Feline Health Center (moisture, convenience), Merck Veterinary Manual (hydration) and VCA (free-choice feeding). The Purina Institute adds that wet food should be served at room temperature and not left out too long (Purina Institute).
When can kittens eat wet food?
Wet kitten food is usually the very first solid food, mixed with milk replacer at about 3 to 4 weeks. The Humane Society of Charlotte keeps wet pâté as the main food for kittens aged 5 weeks and older (HSC).
When can kittens eat dry food?
As early as the start of weaning if the kibble is soaked until soft. Best Friends moves kittens to kitten kibble mixed into wet food at 5 to 6 weeks and mostly dry food from 7 weeks. The VCA hospitals say kittens can eat dry food by 6 to 8 weeks. Choose a kibble made for kittens, not adult cats.
Not sure which food to buy? Our best kitten food guide compares eight foods label by label.
What to look for on a kitten food label
Marketing words on the front of the bag do not tell you much. The small print does.
- A “complete and balanced” statement. AAFCO says this statement is how you confirm the food supplies every required nutrient. It names a life stage: gestation/lactation, growth, maintenance or all life stages. Kittens fall under growth (AAFCO).
- “Growth” or “all life stages.” The VCA hospitals say to look for a statement that the food is complete and balanced for growth or for all life stages, and that a food with no AAFCO statement should not be a kitten’s main diet (VCA).
- Animal protein near the top. Cornell says cats are obligate carnivores and suggests meat, meat by-products or seafood among the first few ingredients (Cornell).
- Kitten food, not adult food. The Merck Veterinary Manual says growing kittens need more calories, fat, protein, vitamins and minerals than adults (Merck). The VCA hospitals add that kitten foods usually contain more calories, protein, calcium, phosphorus and DHA, an omega-3 fat that supports brain and eye development.
Merck says cats need nutrients such as taurine that are not in dog food or human food. The VCA hospitals do not recommend home-cooked diets for kittens, because an unbalanced diet can harm growth. If you want to cook, work with a veterinary nutritionist.
Our kitten food guide has a label checklist and a dry-matter protein table.
How often should kittens eat?
Often, and in small portions. The guidance varies a little by source:
| Source | What it says |
|---|---|
| Merck Veterinary Manual | Kittens under 4 months eat 3 to 4 times a day; the number can drop as they grow |
| VCA Animal Hospitals | 3 to 4 or more small meals a day |
| Purina Institute | Up to 4 small meals a day until 6 months, then 2 is adequate |
| Humane Society of Charlotte | 4 to 5 small meals a day for kittens 5 weeks and older |
| International Cat Care | At least 4 times a day for kittens, or food always available |
The VCA hospitals say that free-choice feeding raises the risk of overweight and obesity, and that portion feeding, adjusted to growth, is better (VCA). Once a kitten is weaned, follow the feeding guide on the pack and adjust using weight and body condition.
For portions by age and weight, use the Kitten Plan builder. For meal times, see the feeding schedule.
Do kittens need water?
Yes, once they are eating solid food. Cornell says fresh, clean water should be available at all times (Cornell). Best Friends puts out a dish of water from the 4-week weaning stage. The Merck Veterinary Manual suggests several bowls cleaned daily, and a water fountain may encourage drinking, since many cats like moving water (Merck).
Use shallow dishes for small kittens. Very young kittens that are still nursing get their water from milk.
What human food can kittens eat?
This is one of the most searched kitten food questions, so here is an honest answer. The veterinary sources we checked do not give an approved list of human foods for kittens. What they do say:
- The Merck Veterinary Manual advises avoiding table scraps and not giving supplements without your vet’s approval (Merck).
- The VCA hospitals say a kitten’s needs are specific and an unbalanced diet can harm growth (VCA).
- Cornell says treats should be occasional and no more than 10 to 15% of daily calories (Cornell).
A good kitten food already covers everything a kitten needs, so there is little reason to add extras. If a kitten is a picky eater, ask your vet what to try rather than guessing.
Foods kittens should not eat
These are on the ASPCA’s list of foods to avoid feeding pets, with extra points from Cornell and Merck. The ASPCA’s list is written for pets in general, so some entries are known mainly from dogs. We have noted where that applies.
| Food | Why it is on the avoid list |
|---|---|
| Onions, garlic, chives | Can irritate the gut and damage red blood cells, leading to anemia. The ASPCA says cats are more susceptible. |
| Chocolate, coffee, caffeine | Methylxanthines can cause vomiting, abnormal heart rhythm and seizures. |
| Alcohol | Absorbed quickly; can cause vomiting, breathing trouble and coma. |
| Xylitol (sugar-free products) | Can cause low blood sugar and possible liver damage. |
| Grapes and raisins | Linked to kidney damage; the ASPCA describes this for dogs, but they are on its avoid list. |
| Raw meat, raw eggs, bones | Raw meat and eggs can carry Salmonella and E. coli; raw eggs can interfere with vitamin absorption; bones can injure or block the gut. |
| Raw diets | Cornell does not recommend them: possible bacteria, viruses and parasites, with no clear benefit. |
| Milk and dairy | Lactose can cause diarrhea or digestive upset. |
| Canned fish made for people | Cornell warns that some cats have developed serious neurological problems from raw meat and human canned fish. |
| Yeast dough | Can rise in the stomach and cause painful bloating; it also produces alcohol as it ferments. |
| Salt and very salty foods | Too much can cause thirst, vomiting, tremors and seizures. |
| Dog food as a regular diet | Cats need nutrients, such as taurine, that dog food does not supply. |
If your kitten eats something on this list, call your vet or an animal poison helpline straight away.
How to switch kitten foods without an upset stomach
If you change brands or move from wet to dry, do it gradually. The VCA hospitals suggest a 7-day change (VCA), and Best Friends uses a similar 7-day swap.
| Days | Old food | New food |
|---|---|---|
| 1 to 2 | About 3/4 | About 1/4 |
| 3 to 4 | 1/2 | 1/2 |
| 5 to 6 | 1/4 | 3/4 |
| 7 | None | All new food |
If your kitten gets diarrhea or stops eating during a change, go back a step and check with your vet.
Six common kitten feeding mistakes
- Giving cow’s milk. See above: it can cause diarrhea and does not match a kitten’s needs.
- Feeding adult cat food too early. Adult food lacks what a growing kitten needs, as International Cat Care and Merck both point out.
- Rushing weaning. Starting too early or switching too suddenly can stress kittens and their mother.
- Forcing a kitten to eat. It risks inhaling food or milk. Go slower and ask your vet if a kitten refuses.
- Free-feeding without watching weight. The VCA hospitals link free-choice feeding to a higher risk of overweight.
- Adding supplements. Cornell and the VCA hospitals say a complete kitten food needs no extras unless your vet approves.
When to call your vet about feeding
Contact your vet if a kitten refuses food, loses weight, stops gaining, has repeated vomiting or diarrhea, or seems weak or cold. Very young kittens can decline quickly. Healthy kittens are active between meals, have regular bowel movements and are alert, according to the Humane Society of Charlotte. Track weight with a kitchen scale and use our kitten age chart if you are not sure how old your kitten is.
This guide shares published information and does not replace a vet’s advice for your kitten.
When do kittens stop eating kitten food?
The Merck Veterinary Manual says to keep feeding a balanced kitten diet until adulthood, around 9 to 12 months (Merck). The Purina Institute says a complete and balanced growth diet should continue until full skeletal maturity, typically about a year. The VCA hospitals note that most kittens eat kitten food for about a year before moving to adult food.
We cover the switch in detail in How Long Should Kittens Eat Kitten Food? If you are still working out your kitten’s age, our guide to telling if a kitten is a boy or girl may also help while you are getting to know them.
Frequently asked questions
What do kittens eat at 4 weeks old?
At about 4 weeks most kittens are still drinking milk, from their mother or a kitten milk replacer, while starting on a soft mush of wet kitten food mixed with replacer. Best Friends starts weaning at 4 weeks and International Cat Care at 3 to 4 weeks. Offer small amounts in a shallow dish and never force a kitten to eat.
When can kittens eat wet food?
Wet kitten food is usually the first solid food, offered mixed with milk replacer at about 3 to 4 weeks. The Humane Society of Charlotte uses wet pâté as the main food for kittens aged 5 weeks and older, with softened kibble added gradually.
When can kittens eat dry food?
Soaked kitten kibble can be offered from the start of weaning. The VCA hospitals say kittens can eat wet or dry food by 6 to 8 weeks, and Best Friends moves kittens to mostly dry food from about 7 weeks. Use kibble made for kittens.
What do kittens eat if they have no mother?
Newborn kittens without a mother need a kitten milk replacer, fed warm and on a strict schedule, until weaning starts at about 3 to 4 weeks. Do not use cow’s or goat’s milk. Call a vet or local rescue for help, because very young kittens can decline quickly.
Can kittens drink cow’s milk?
No. International Cat Care says cow’s milk has protein and fat levels that are too low for kittens, and the Purina Institute and Cornell say it can cause diarrhea or stomach upset because many cats cannot digest lactose. Use a kitten milk replacer for orphans and fresh water for weaned kittens.
What human food can kittens eat?
The veterinary sources we checked do not give an approved list of human foods for kittens. Merck advises avoiding table scraps, and Cornell says treats should be no more than 10 to 15% of daily calories. A complete kitten food covers a kitten’s needs. Ask your vet before adding anything.
Can kittens eat adult cat food?
Not as their main diet. Growing kittens need more calories, protein, fat, vitamins and minerals than adults, so they should eat food labeled complete and balanced for growth or all life stages until about 9 to 12 months.
How often should kittens eat?
Merck advises 3 to 4 meals a day for kittens under 4 months, and the Purina Institute says up to 4 small meals a day until 6 months, then 2. Young weaning kittens may need 4 to 5 smaller meals. Use portions rather than constant free-feeding.
Do kittens need water?
Yes, once they are eating solid food. Keep fresh, clean water available at all times in shallow dishes, and clean the bowls daily. Nursing kittens get their water from milk.
Sources
- Best Friends Animal Society: How to care for orphaned kittens, feeding and weaning
- International Cat Care: Hand-rearing kittens
- International Cat Care: Feeding your cat or kitten
- International Cat Care: Bringing up a litter of kittens, health considerations
- Merck Veterinary Manual: Kitten care (cat owners)
- Merck Veterinary Manual: Proper nutrition for cats
- Merck Veterinary Manual: Management of the neonate in dogs and cats
- Cornell Feline Health Center: Feeding your cat
- VCA Animal Hospitals: Feeding growing kittens
- VCA Animal Hospitals: How to choose the right kitten food
- AAFCO: Selecting the right pet food
- ASPCA: People foods to avoid feeding your pets
- Purina Institute: How and what to feed kittens
- Humane Society of Charlotte: Kittens 5 weeks and older, feeding and care
