Kitten care: socialization, vaccines, neutering and the first year
A kitten's first year sets up its whole life. The most important window is socialization between about 2 and 7 weeks of age, so a good start begins with the breeder or rescue. Kittens should stay with their mother until at least 8 weeks old, start core vaccines from 6 to 8 weeks, be neutered by about 4 to 5 months, and eat a food labeled complete and balanced for growth.
Kitten timeline at a glance
| Age | What happens |
|---|---|
| 2 to 7 weeks | Key socialization period: gentle handling by several people and calm exposure to everyday sights and sounds. |
| 6 to 8 weeks | First core vaccine (no earlier than 6 weeks); first vet check, deworming. |
| At least 8 weeks | Earliest age to leave the mother, according to Cats Protection; many breeders keep kittens longer. |
| Every 3 to 4 weeks until 16 to 20 weeks | Core vaccine boosters (see below). |
| About 4 to 5 months | Neutering. Females can become pregnant from around 4 months. |
| 6 months | Extra core vaccine dose recommended by the 2020 AAHA/AAFP guidelines. |
| 12 months | End of the "kitten" life stage (AAHA/AAFP); move to adult food when your vet advises. |
Socialization: the 2 to 7 week window
International Cat Care and Cats Protection both describe roughly 2 to 7 weeks of age as the sensitive period when kittens learn what is normal and safe. Kittens gently handled by several different people, and calmly exposed to household sounds, objects and other friendly animals during this time, are more likely to grow into confident, people friendly cats. Socialization continues after 7 weeks, but this early window cannot be repeated.
What this means for you: when choosing a kitten, ask how the litter has been raised, whether it lived in a busy home, and who has handled the kittens. Once your kitten is home, keep new experiences positive, short and at the kitten's pace, and always let it retreat.
When can a kitten leave its mother?
Cats Protection advises not separating kittens from their mother before 8 weeks of age, because they are still learning from her; kittens separated early may keep juvenile behaviors such as suckling. Many pedigree breeders keep kittens longer so that vaccinations are underway before they go to new homes.
Kitten vaccines
Under the 2020 AAHA/AAFP Feline Vaccination Guidelines, the combination vaccine against feline panleukopenia, herpesvirus and calicivirus starts no earlier than 6 weeks of age and is repeated every 3 to 4 weeks until 16 to 20 weeks, with a further dose at 6 months. Feline leukemia virus vaccine is core for kittens: two doses 3 to 4 weeks apart from as early as 8 weeks. Rabies is given as required by law. Keep your kitten away from unvaccinated cats until the course is complete. See vaccines.
Neutering
Cats can reach sexual maturity surprisingly young. The AAFP supports neutering cats not intended for breeding by 5 months of age, an approach known as "Fix by Five" that is endorsed by AAHA, the AVMA and others. In the UK, Cats Protection recommends around 4 months, because females can become pregnant from about that age. Neutering prevents unplanned litters and, according to AAHA, greatly reduces the risk of mammary cancer in females and spraying in males.
Feeding a kitten
Choose a food labeled complete and balanced for growth (or for all life stages), and feed several small meals a day. Keep fresh water available. Milk is not needed after weaning and can upset a kitten's stomach. Avoid raw meat diets, which Cornell does not recommend because of infection risks. See cat nutrition.
Kitten proofing your home
- Remove lilies and other toxic plants entirely (why lilies are so dangerous; check others in the toxic to cats checker).
- Put away string, thread, hair ties, elastic bands and tinsel, which can be swallowed.
- Secure blind cords and electrical cables, and keep washing machine and dryer doors closed.
- Store medicines, cleaning products and dog flea treatments out of reach.
- Give your kitten a quiet base room with a bed, hiding place, litter box, food and water before letting it explore the whole home.
Kitten FAQ
At what age can a kitten leave its mother?
Not before 8 weeks of age, according to Cats Protection, because kittens are still learning from their mother. Many breeders wait longer so vaccinations have started.
When should a kitten be neutered?
The AAFP supports neutering by 5 months of age, and Cats Protection recommends around 4 months, since female kittens can become pregnant from about 4 months old.
When do kittens get their vaccinations?
Core vaccines start no earlier than 6 weeks of age and are repeated every 3 to 4 weeks until 16 to 20 weeks, with a further dose at 6 months, under the 2020 AAHA/AAFP guidelines. Your vet will set the exact schedule.
When is a kitten considered an adult cat?
The AAHA/AAFP life stage guidelines define the kitten stage as birth up to 1 year; from 1 to 6 years a cat is a young adult.
Sources
- International Cat Care: Bringing up a litter of kittens: behavioural considerations
- Cats Protection: Kitten socialisation
- Cats Protection: Kitten care
- Cats Protection: Neutering your cat
- AAFP Position Statement: Pediatric Sterilization in Cats (2020)
- AAHA: When should I spay or neuter my pet?
- AAHA/AAFP 2020 Feline Vaccination Guidelines: Core vaccines for pet cats
- AAHA/AAFP 2021 Feline Life Stage Guidelines: Feline life stage definitions
- Cornell Feline Health Center: Feeding Your Cat
General education, not veterinary advice. If you are worried about your cat, contact your veterinarian; in an emergency, go to the nearest emergency vet.