How Much to Feed a Kitten: A UK Guide for New Owners
Kittens grow at a remarkable rate — a kitten's birth weight typically doubles within the first week of life, and they reach approximately 75% of their adult weight by six months. This rapid growth means nutrition in the first year is critically important. Getting kitten feeding right from the start sets the foundation for a long, healthy life.
Key takeaways
- Kittens must eat food specifically formulated for kittens or 'all life stages' — adult cat food does not provide the correct nutrient balance for rapid growth.
- Feed four small meals daily at 8–12 weeks, reducing to twice daily by 6 months — and adjust portions as your kitten grows.
- After neutering (usually at 4–6 months), reduce food portions by 20–30% to prevent the very common post-neutering weight gain.
What to Feed a Kitten
Kittens have higher protein, fat and caloric requirements per kilogram of body weight than adult cats. They must eat food specifically formulated for kittens — adult cat food does not provide the correct nutrient balance for a growing kitten. In particular, kittens need higher levels of protein, DHA (for brain and eye development), calcium and phosphorus than adult cats.
Always choose foods labelled 'complete' for kittens or 'for all life stages'. Complementary foods — treats, toppers, mixer foods — must not be fed as the sole diet. Look for FEDIAF-compliant foods with named meat sources (e.g. chicken, salmon, turkey) as the primary ingredients.
For kittens transitioning from weaning (typically around 8 weeks), both wet and dry complete kitten foods are appropriate. Many UK vets recommend incorporating wet food from the start to establish good hydration habits, as adult cats that were raised exclusively on dry food can be reluctant to drink sufficient water.
How Much to Feed by Age
At 8–12 weeks, kittens typically need four small meals per day. Their stomachs are tiny and they require frequent feeding to maintain blood sugar and support rapid growth. Manufacturers' feeding guides should be followed for the specific product, using your kitten's current weight.
At 12–16 weeks, three meals per day is usually sufficient. By 6 months, most kittens can be fed twice daily. Amounts should be adjusted regularly as your kitten grows — weigh them monthly and update portions accordingly.
Unlike dogs, kittens can be more prone to obesity if overfed as adults, but underfeeding during growth phases is also harmful. The goal is keeping your kitten lean and well-muscled throughout kittenhood, with regular weight checks at your vet practice ideally every 4–6 weeks in the first six months.
Wet vs Dry Kitten Food
Both wet and dry kitten foods can provide complete nutrition when labelled appropriately. The main advantages of wet food for kittens are: higher moisture content supporting hydration and kidney health long-term, greater palatability for fussy eaters, and typically higher meat content by proportion.
Dry kitten food is more convenient, has a longer shelf life once opened, and may offer a modest dental benefit through mechanical chewing. Many vets recommend a combination approach — wet food as the main diet with dry food as part of the rotation — to ensure good hydration habits and variety.
Whichever approach you choose, introduce new foods gradually. If your kitten was eating a specific food at the breeder or rescue centre, ask for a supply to take home and transition slowly to your chosen food over 7–10 days to minimise digestive upset.
Foods to Avoid for Kittens
Several foods commonly found in UK households are toxic to kittens and must never be fed. Onions, garlic, chives and leeks — whether raw, cooked or powdered — cause red blood cell damage. Grapes and raisins can cause acute kidney failure even in very small quantities.
Kittens should not be given cow's milk. Despite the cultural image of cats and milk, most cats are lactose intolerant and cow's milk causes diarrhoea. Specialist cat milk products with reduced lactose are available if you want to give milk as an occasional treat.
Raw meat fed to kittens carries additional risks compared to adult cats — their immune systems are still developing, making them more vulnerable to bacterial pathogens like Salmonella and Campylobacter. If you plan to feed raw, wait until your kitten is fully vaccinated and discuss this with your vet first.
Transitioning to Adult Cat Food
Most kittens can transition to adult cat food at approximately 12 months of age. Large or slow-maturing breeds like Ragdolls and Maine Coons may benefit from staying on kitten or 'all life stages' food until 18 months.
Transition gradually over 7–10 days: days 1–3, use 75% kitten food and 25% adult food; days 4–6, use 50/50; days 7–9, use 25% kitten food and 75% adult food; from day 10, feed adult food only. This gradual change minimises the risk of digestive upset.
Neutering, typically performed at around 4–6 months in the UK, changes your kitten's caloric requirements. Neutered cats need approximately 20–30% fewer calories than intact cats. After neutering, reassess portion sizes to avoid post-neutering weight gain, which is extremely common.
Find a Vet Near You
Regular weight checks and health assessments in the first year of a kitten's life are essential. Kitten vaccination packages and first consultations vary in price across UK practices — primary kitten vaccinations cost £50–£90.
Use [CompareMyVet](https://app.comparemyvet.uk) to compare prices for kitten vaccinations and consultations at practices near you and find the best value transparent pricing.
Common questions
Treats are fine in moderation but should account for no more than 10% of total daily calories. At 8–16 weeks, portions are already very small, so even a few treats can unbalance the diet. Stick to small pieces of cooked chicken or proprietary kitten treats with known caloric content.
Some reduction in appetite is normal when a kitten moves to a new home, during teething (around 3–6 months) and shortly after vaccinations. However, a kitten that does not eat for more than 24 hours should be seen by a vet promptly — kittens have limited energy reserves and can deteriorate quickly when not eating.
Ideally within 48–72 hours of coming home, even if they are already vaccinated. A first health check allows your vet to assess body condition, check for any health concerns, begin or verify vaccination records, and discuss parasite control, neutering and feeding plans.
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