When should a kitten have its first vet visit and vaccines?

A kitten should see a veterinarian within the first week of coming home, even if she appears perfectly healthy, so a vet can check for congenital issues like a heart murmur or cleft palate and start a vaccine series while maternal antibodies are still fading. The American Association of Feline Practitioners recommends the core kitten series — FVRCP (feline viral rhinotracheitis, calicivirus, panleukopenia) — begin around 6 to 8 weeks of age and repeat every 3 to 4 weeks until the kitten is at least 16 weeks old, because maternal antibody interference can block a vaccine from working if given too early (AAFP, 2020).

Rabies vaccination timing varies by state law, but most protocols give the first dose at 12 to 16 weeks. Kittens should also be tested for feline leukemia virus (FeLV) and feline immunodeficiency virus (FIV) at the first visit, since both are transmissible between cats in the household and knowing status early changes how a kitten is introduced to resident pets (Cornell Feline Health Center, 2021). Fecal testing for intestinal parasites at this same visit catches roundworms and hookworms that are extremely common in kittens regardless of how clean they look.

How often does a kitten actually need to be dewormed?

Roundworms are passed from queen to kitten primarily through nursing, so the Companion Animal Parasite Council recommends deworming kittens starting at 2 weeks of age and repeating every 2 weeks until 8 weeks old, then monthly until 6 months (CAPC, 2023). This schedule looks aggressive compared to adult cat deworming, but it reflects how common and reinfective these parasites are in young cats — a single fecal exam can miss an active infection if the worms haven't started shedding eggs yet.

Some roundworm and hookworm species in kittens are zoonotic, meaning they can infect people, particularly children who may put contaminated hands in their mouths after handling litter or soil. The CDC specifically flags Toxocara cati as a cause of visceral and ocular larva migrans in humans, which is part of why consistent kitten deworming is treated as a household health issue, not just a cat health issue (CDC, 2022).

What should a kitten be eating, and how much?

Kittens need a diet formulated specifically for growth, not an adult maintenance food, because they require roughly twice the protein and higher levels of calories per pound than adult cats to support rapid skeletal and organ development. WSAVA guidance recommends looking for an AAFCO statement confirming the food is 'formulated for growth' or 'all life stages' and feeding free-choice or 3 to 4 small meals a day until around 6 months of age (WSAVA, 2021).

Weaning typically happens between 4 and 8 weeks, with kittens transitioned gradually from moistened kitten food to dry kibble and water. Cow's milk should never substitute for a milk replacer or food, since most cats are lactose intolerant past weaning and dairy commonly causes diarrhea. A kitten's weight should be tracked at every vet visit — a healthy kitten typically gains around 1 pound (0.45 kg) per month for the first several months, and a plateau or drop is worth flagging to a vet promptly (Cornell Feline Health Center, 2021).

How do you litter box train a kitten that keeps missing?

Most kittens instinctively use a litter box by 4 weeks of age because digging and burying waste is an innate behavior, but success in a new home depends on setup more than training. The general rule from shelter behavior programs is one litter box per cat plus one extra, placed in quiet, low-traffic locations away from food and water, since cats will avoid boxes that feel exposed or smell strongly of detergent or other cats (ASPCA, 2023).

Unscented, fine-grained clumping litter is generally best tolerated, and boxes should be scooped daily, since kittens are more likely to reject a soiled box than adult cats. If a kitten who was previously reliable starts urinating outside the box, that's a signal to rule out a urinary tract issue with a vet visit rather than assume it's purely behavioral, particularly because straining to urinate with little output can indicate a blockage requiring same-day care.

When should kittens be spayed or neutered?

The American Veterinary Medical Association and the Association of Shelter Veterinarians both support spaying or neutering kittens as early as 8 weeks of age when they meet a minimum weight (usually around 2 pounds), a practice known as pediatric or early-age sterilization that shelters use to prevent unplanned litters before adoption (AVMA, 2023). For kittens going to a single-pet home, many general practice vets still schedule the surgery around 5 to 6 months, though earlier is medically supported and reduces the risk of mammary tumors in female cats when done before the first heat cycle.

Cornell's feline health researchers note that cats spayed before 6 months have a significantly lower lifetime risk of mammary carcinoma compared to those spayed after their first or second heat, since mammary tissue develops hormone receptors that increase cancer risk with each cycle (Cornell Feline Health Center, 2021). Unneutered male kittens also begin spraying and roaming behavior as early as 5 to 6 months, which is one reason many vets recommend not delaying past that window.

How important is socialization during the first weeks, and what does it actually involve?

The primary socialization window for kittens runs from about 2 to 7 weeks of age, and behaviorists consider it the single most influential period for shaping how a cat will react to people, handling, and new environments for the rest of its life (Cornell Feline Health Center, 2021). Kittens exposed briefly and positively to gentle handling, different people, car rides, carrier use, and household sounds during this window tend to grow into more confident, adaptable adult cats, while kittens isolated during this period are more prone to fear-based aggression and hiding later on.

Because many kittens come home after this window has already started or partly closed, continued gentle exposure through about 4 months of age still helps, just with diminishing returns. Short, positive carrier trips (not only to the vet), handling paws and ears for grooming and nail trims, and supervised introductions to other resident pets over several days — rather than all at once — build the associations that make routine vet care and daily life less stressful long term.

How do you introduce a new kitten to resident cats or dogs?

Sudden introductions are the most common reason new kitten integrations fail, so most behaviorists recommend a staged process: keeping the kitten in a separate room with its own litter box, food, and bed for several days to a week, then swapping scents via bedding before any visual contact, and finally allowing supervised, brief face-to-face meetings (ASPCA, 2023). Resident cats often need 2 to 4 weeks of gradual introduction before tension resolves into tolerance or friendliness, and rushing this process is a leading cause of inter-cat conflict that persists for months.

With resident dogs, the kitten should always have an escape route — a tall cat tree, baby gate, or door the dog can't follow through — until the dog's response to the kitten is reliably calm on multiple occasions. Hissing and swatting from an established cat toward a new kitten is normal early behavior and not necessarily a sign the introduction is failing, but ongoing stalking, cornering, or refusal to eat in a resident pet's presence warrants slowing the process down.