3-week-old kitten care guide: weight, development and feeding tips

At three weeks old, kittens weigh between 350-450 grams and show significant developmental progress. Their blue eyes and upright ears become more pronounced, while their first incisor teeth emerge. Kittens begin walking, exploring their environment, and showing interest in toys, though their coordination remains developing. They still require a heat source to maintain their body temperature of 99-100°F in an environment kept around 24°C.

Physical development at this stage includes improved vision and hearing, along with emerging baby teeth. Kittens start retracting their claws and demonstrate early grooming behaviours. Their mobility increases, allowing them to investigate surroundings, though they still sleep frequently.

Behavioural changes become noticeable as kittens show curiosity about objects and begin interacting with littermates. They may attempt basic play but lack the coordination for chasing movements. Introducing a shallow litter tray with non-clumping litter helps familiarise them with toileting areas, though proper use may take more time.

Temperature regulation remains crucial. While more active than newborn kittens, three-week-olds still need a warm area maintained at approximately 24°C. They may wander from heat sources when awake but require easy access to warmth for sleeping periods.

Feeding routines depend on whether the mother is present. Kittens with their mother should nurse freely. Orphaned kittens require bottle feeding with kitten milk replacer every 4-5 hours. Never use cow's milk as it lacks essential nutrients and can cause digestive issues.

Care essentials include:

1. Providing a safe, warm environment with bedding
2. Monitoring weight gain daily
3. Using non-clumping litter in shallow trays
4. Beginning gentle handling to socialise kittens
5. Consulting a veterinary surgeon for health checks

Kittens should remain with their mother whenever possible, as she provides essential care including grooming, feeding and teaching social behaviours. Those without maternal care require round-the-clock attention from experienced caregivers to ensure proper development.