The first six weeks of a kitten's life are crucial for development. Kittens grow quickly but are susceptible to various threats. Now outside the womb, a kitten will need warmth, food, and protection from infectious diseases and parasites (such as fleas).
Kittens will probably never grow again at the remarkable rate they accomplish during this period, and seeing the changes in their development from week to week is an incredible experience. Learn about their first week and move on from there.
Week 1: Tiny Food Processing Factories
The newborn kitten weighs just ounces and easily fits into the palm of your hand. Its umbilical cord will fall off within two or three days, but its eyes and ear canals will not be open yet.
Kittens are very helpless at this age, but the mother cat instinctively knows their needs. She feeds them, keeps them close by for warmth, and bathes them with her rough tongue, which also stimulates their digestion and helps them urinate and defecate. Mother cats are very protective of their little ones and will move them to another location if humans intrude too much into the nest.
Provided the mother has been vaccinated or has natural immunity, the kittens will receive this same immunity for the first 24 to 48 hours through her colostrum, and it will last until they are old enough to get their kitten shots.
Newborn kittens weigh an average of 3.5 ounces at birth and can double their weight by the end of the first week. It's a good idea to weigh them and monitor their weight to ascertain if they are getting adequate nutrition. They are simply little food processing factories at this point, and their only activities are nursing, sleeping, and passing waste. There is very little social interaction at this age, other than competing for their favorite nipple, where they will suckle while kneading with their tiny paws.1
The rule of thumb in regards to the amount to feed young kittens is eight cc of formula per ounce of body weight per day. You will gradually increase the amount of formula for each feeding and decrease the number of feedings. A cubic centimeter (cc) is the same as a milliliter (ml). An ounce equals 30 cc or ml.
4 Week Old Kitten Feeding Schedule: From Birth to Eight Weeks
Week 2: Growing and Developing
Your kitten is continuing its growth at an astonishing rate, by at least 10 grams per day. The mother cat should be fed a quality canned kitten food to help replenish the nutrients she loses through nursing. Later on, the kittens will be introduced to the same food.
Its eyes will start to open and will be completely open at nine to 14 days old.1 All kittens' eyes are blue and will remain so for several weeks. Their vision will be blurred at first, and their pupils don't dilate and contract readily, so they should be kept from bright lights.
Week 3: Awareness is Developing
Ear canals will be completely open, and their sense of hearing is still developing. However, the kittens may startle at loud sounds. Their ears may be fully erect by this age.
Their eye color may start to change, from the blue shared by all kittens to the adult hue. Their sense of smell will be well developed.1 Kittens can voluntarily eliminate now, as their digestive system is developing. The mother cat will continue to clean them until they learn grooming skills.
Don't be surprised to hear kittens start to purr at this young age. Baby teeth will start to come in now, and the mother cat will start thinking about weaning.
Week 4: Standing and Wobbling
Kittens will start to stand sometime between the third and fourth weeks and will try to walk, although their first movements will be very wobbly.1 Their bodies are out of proportion to their eventual adult state. Little tails are very short and "stick-like," and their heads are disproportionately large for their bodies and legs. This will all change, though, as they get their "sea legs" and start moving around.
Don't be surprised to see kittens escaping from their nesting area as they seek to expand their horizons. They will also interact more with their litter mates, even to the point of forming "alliances," which may or may not be gender-based.
Kittens will continue to nurse regularly. It is important to continue feeding the mother good quality food, as long as she is nursing kittens.
Week 5: Starting the Weaning Process
Kittens will be walking around freely at this time and starting to play with their siblings.1 They will be developing a new sense of independence, although they may not stray far from their mother or their littermates. This will be a very good time for them to socialize with humans.
Kittens may be introduced to canned food at this time. Select a quality brand of kitten food with a named meat source as the first ingredient (chicken is good). Ideally, they should be given the same kitten food given the mother cat, as the kittens will quickly accommodate and eat mom's food. Use a shallow plate and expect their first experiences to be messy.
Although the mother cat will try to wean the kittens, they still need the nursing experience to satisfy their suckling needs—at least until they are eight or 10 weeks old, by which time the mother cat will have gradually weaned them.
Kittens can also learn litter box basics now. They need a smaller, separate box, one that will be easy to access and exit, with only an inch or two of litter. A shallow plastic storage box or lid to a shoebox might work for starters. As human babies experiment by tasting everything, so will kittens. Avoid their ingestion of harmful substances by using a natural litter such as one made from corn cobs, paper, or wood chips—never use clumping clay.
Week 6: Socialization in Full Swing
Socialization skills continue, and there is no doubt that these are lively, active, kittens who will grow up all too soon to be adult cats. They can run, pounce, and leap, and can entertain themselves and their human observers endlessly. Just as quickly they can fall asleep at the drop of a hat (growing up is hard work), so take care not to let them tire.
Kittens will follow their mother cat's lead in socializing with humans. If she has a comfortable relationship with the humans in her life, so will her kittens. However, if kittens are not accustomed to human handling by six weeks, it may be a long, slow, process to train them later, and such a cat may never be a "lap cat."
Tip
Kittens should learn at this age that hands are not for playing—hands are for holding, petting, and feeding. One of the best "toys" for teaching this lesson is a plastic drinking straw. You can drag it across the floor and watch the kitten chase it, then wiggle it a bit, and allow it to pounce on it and "capture" it. The baby may proudly strut with its prize before settling down to bite on it. Make sure to supervise your kitten while with the straw, as you don't want them ingesting plastic.
Almost Time to Go Home
Well-socialized and completely weaned kittens may be ready for their new forever homes in just a couple of weeks from now. If you've been waiting for kittens to be old enough to adopt, you'll probably be pretty excited by this time.
Patience, though. Remember, "all good things are worth waiting for," and in ideal circumstances, kittens are not ready for adoption until they are between 7 and 9 weeks old.2
FAQ
What should I do if a kitten appears to be sick or not gaining weight?
Regular monitoring of a kitten's weight is crucial in the early weeks. If a kitten is not gaining the expected weight or appears unwell, it is recommended to consult a veterinarian to rule out any health issues and ensure the kitten receives the necessary care.
When can I start introducing solid food to my kitten?
Around the fifth week, kittens can be introduced to canned kitten food. Ensure the food has a named meat source as the first ingredient, such as chicken, and start with small, manageable quantities.
How can I encourage proper socialization for my kitten?
It's vital for kittens to socialize with humans and their environment by the sixth week to ensure they grow up to be well-adjusted adults. Interacting gently and frequently with the kittens, and exposing them to various sounds and settings, can help foster healthy socialization.
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