Neonatal & Kitten Care

How Old Is That Kitten? A Visual Age Guide

Identify a kitten's age by eyes, ears, teeth, weight, and mobility — with the care each stage needs.

Found a kitten and not sure how old they are? Age drives everything — how often to feed, whether they need a heat source, whether they can eat on their own, and whether they even need to be pulled from outside. Use the milestones below to place a kitten within a week or two, then jump to the care notes for that stage. A quick rule of thumb: healthy kittens gain about 10 grams (roughly ¼ oz) per day for the first several weeks. A kitchen or postal scale is one of the most useful tools a foster can own.

Newborn — 0 to 1 week (about 50–150 g / 1.7–5 oz)

Newborn kittens, 0-1 week old
  • Eyes & ears: Eyes shut. Ears folded flat against the head. Umbilical cord may still be attached in the first few days and dries up around day 3–5.
  • Body & mobility: Can't stand or walk — squirms and paddles. Can't regulate body temperature; must stay on a heat source.
  • Care: Bottle-feed kitten formula (never cow's milk) every 2 hours around the clock. Stimulate to pee and poop with a warm damp cloth after each feeding. Keep on a heating pad set to low, under a blanket, with room to move off the heat.

1 to 2 weeks (about 150–250 g / 5–9 oz)

Baby kittens, 1-2 weeks old, eyes just opening
  • Eyes & ears: Eyes start to open between days 7–14 — always blue at first. Ears begin to unfold.
  • Body & mobility: Starting to wiggle and push up on front legs. Still can't regulate temperature reliably.
  • Care: Bottle every 2–3 hours. Continue stimulation for elimination. Keep warm.

3 weeks (about 250–350 g / 9–12 oz)

Toddler kittens, about 3 weeks old
  • Eyes & ears: Eyes fully open, still blue. Ears upright. Baby (deciduous) incisors start to erupt.
  • Body & mobility: Wobbly walking. Starts to play with littermates. Beginning to thermoregulate.
  • Care: Bottle every 3–4 hours. Introduce a shallow litter box with non-clumping litter. Can start to eliminate on their own.

4 weeks (about 350–450 g / 12–16 oz)

Kinder kitten, 4 weeks old
  • Eyes & ears: Baby canines coming in. Eyes may begin to shift from blue toward adult color.
  • Body & mobility: Walking, running short bursts, pouncing. Play-fighting with littermates. Grooming themselves a little.
  • Care: Start weaning — offer a slurry of formula mixed with wet kitten food. Still bottle-feed to supplement. Reliable litter box use.

5 to 6 weeks (about 450–700 g / 1–1.5 lb)

Kiddo kitten, 5-6 weeks old
  • Eyes & ears: Baby premolars come in. Eye color continues to change.
  • Body & mobility: Confident on their feet. Full-body play. Climbing.
  • Care: Mostly eating wet kitten food; taper bottle feedings. Fresh water available at all times. First deworming is usually appropriate around this age.

7 to 8 weeks (about 700 g – 1 kg / 1.5–2 lb)

Cuddly kitten, 7-8 weeks old
  • Teeth & body: Full set of 26 baby teeth. Eye color set (though can keep changing until ~3 months). Coat looks fluffier.
  • Milestones: Fully weaned. Eating solid wet — and often some dry — kitten food. Using the litter box reliably.
  • Care: At 2 lb / ~8 weeks, kittens are eligible for their first FVRCP vaccine and, at most Houston-area clinics, spay/neuter surgery. This is the earliest age most rescues will adopt out — but staying with the litter longer helps with social skills.

9 to 12 weeks (about 1–1.6 kg / 2–3.5 lb)

Kitty kitten, 9-12 weeks old
  • Body & coordination: Coordinated, springy, and confident. Full-throttle play, real jumps and pounces, more nuanced social skills with littermates and people.
  • Teeth & eyes: All 26 baby teeth in. Eye color continues to settle toward its adult shade.
  • Care: Eating wet and/or dry kitten food on their own — free-feed or offer 3–4 meals a day. FVRCP booster around 12 weeks. Spay/neuter if not already done. Prime window for handling, gentle grooming, nail trims, and carrier practice.

3 to 4 months

Kit-teen, 3-4 months old
  • Teeth: Baby teeth begin to fall out; adult teeth start coming in around 3–4 months and finish around 6 months.
  • Body: Rapid growth. Long legs, gangly proportions. Endless energy.
  • Care: Booster vaccines on schedule. Spay/neuter before 5 months per the ASPCA's Fix By Five recommendation, or as soon as your clinic allows.

When to intervene

Age changes the answer to 'should I take these kittens inside?' In many cases, mom is nearby and the safest thing is to wait and watch. Our Found a Kitten guide walks through the full decision.

Not sure? Ask before you scoop

Reach out via our intake form before pulling healthy-looking kittens from outside — mom is often the best possible caregiver until they're weaned.

Sources & further reading

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