Kitten timeline · 6–12 months

Kittens 6–12 months: the teen stage and the switch to adult food

Growth slows, personality takes over and your kitten starts to look like a cat. The big feeding jobs now: fewer meals, adjusting after spay or neuter, and planning a smooth move to adult food.

Reviewed October 2026 · Sources

Food

Kitten food until ~12 months

Meals

2–3 a day

Calories

About 2× resting energy, falling

Watch

Weight after spay/neuter

What's happening

What happens from 6 to 12 months

Growth slows down. Most cats reach close to adult size around 12 months. Large breeds such as Maine Coons and Ragdolls keep growing for longer.
Adult teeth are in by about 6–7 months.
Spay/neuter changes the maths. Neutered cats need noticeably fewer calories, so this is when many kittens start to gain too much.
Teen energy. Expect bursts of zoomies, testing boundaries and lots of play. Two short play sessions a day help a lot.

Feeding

Feeding the teen kitten

Calories: energy needs per pound fall steadily as growth slows. AAHA’s feline guidelines put a 10-week-old at about 200 kcal per kg a day and a 10-month-old at about 80. We start teens at about 2× resting energy and ease toward adult levels by 12 months: a 7 lb (3.2 kg) kitten at around 6 months needs roughly 335 kcal a day, less after spay/neuter. Use the Kitten Plan builder for your kitten’s numbers.
Meals: 2–3 a day. Scheduled meals make it easier to spot appetite changes than free-feeding.
After spay or neuter: ask your vet whether to trim portions. Check body condition every couple of weeks: ribs easy to feel, waist visible from above.
Treats: still no more than 10% of daily calories.

Switching to adult food

Most kittens can move to adult food at around 12 months; large breeds may do better on kitten food until about 18 months (see our guide to how long kittens should eat kitten food). Make the change gradually over 7–10 days so tummies can adjust:

Days	Kitten food	Adult food
1–3	75%	25%
4–6	50%	50%
7–9	25%	75%
10+	0%	100%

If you notice loose stools or your cat refuses the new food, slow down and spend a few more days at each step.

Your checklist

What you need this stage

A kitchen scale or measuring cup, so portions stay accurate after spay/neuter
A larger litter box: the rule of thumb is one box per cat, plus one
Puzzle feeders, to slow fast eaters and add mental exercise
A cat tree or wall shelves for climbing
A pet-safe toothbrush and toothpaste, if you want to start dental care

See our kitten essentials checklist.

Call your vet if…

Straining in the litter box or peeing very often (an emergency in male cats)
Sudden weight gain or loss
Vomiting or diarrhea lasting more than a day
Not eating for 24 hours
Swelling, redness or discharge at a spay/neuter wound

Keep portions on track

Re-run your kitten’s plan after spay or neuter, and again as they approach their first birthday.