Kitten

A kitten is a juvenile cat. They are highly social animals that often enjoy companionship with humans.

Because they are born in a state of primary altriciality, they are completely dependent on their mothers for survival. This means they cannot regulate their own body temperature or perform basic bodily functions alone. Most kittens are born in a group known as a litter. While a typical litter contains two to five kittens, some can have as few as one or more than ten.

The process of development begins with a gestation period. This is the time the mother is pregnant, which averages 66 days.

When kittens are born, they emerge inside a sac called the amnion. The mother cat typically bites this sac off and eats it. For the first three weeks, kittens cannot regulate their body temperature. If temperatures are below 30°C, they may die from hypothermia without their mother's warmth. They also require their mother to stimulate them so they can urinate or defecate.

Nutrition is a critical part of a kitten's early survival. During the first few days, the mother produces colostrum. This specialized milk contains high concentrations of immunoglobulins, such as immunoglobulin A and G. These antibodies cross the neonatal intestinal barrier to build the kitten's immune system.

As they grow, kittens undergo weaning, which is the transition from milk to solid food. This usually begins at three to four weeks and is complete by six to eight weeks. While they eventually live on solid food, many kittens continue to suckle occasionally until they are separated from their mothers.

Kittens undergo several physical stages as they mature. They usually open their eyes seven to ten days after birth. However, their vision remains poor at first because the retina is not fully developed. They do not reach adult-level vision until about ten weeks of age. Between two and seven weeks, they develop rapid coordination and strength. They begin to lose their baby teeth around three months of age. By nine months, they have a complete set of adult teeth.

As natural carnivores, kittens have very specific dietary requirements to support their rapid growth. They require high levels of protein and fat, as energy needs can be 2.5 times higher than adult maintenance levels. They specifically need an amino acid called taurine, which the mother cannot produce in sufficient amounts. A deficiency in taurine can lead to poor growth and retinal degeneration. They also benefit from docosahexaenoic acid, or DHA, which is an omega-3 fatty acid. DHA is vital for the development of the brain, cognition, and vision.

Social behavior and instinctual learning also define the kitten stage. Kittens practice their innate predatory skills through play-fighting and stalking games. Mothers assist this development by bringing live prey to the nest and demonstrating hunting techniques. Social interaction with littermates is very high, peaking in play during the third or fourth month. Solitary play, such as stalking, tends to peak later around five months.

Because they are curious, kittens are vulnerable to hiding in dangerous places, such as car engines or tires.

Health management is important for kittens entering domestic environments. In many societies, kittens receive vaccinations against diseases like feline viral rhinotracheitis (FVR), feline calicivirus (C), and feline panleukopenia (P). These are often given at eight, twelve, and sixteen weeks. Many kittens are also spayed or neutered, sometimes as early as seven weeks in animal shelters. While kittens can be sent to new homes at six to eight weeks, many experts suggest staying with the mother until twelve weeks for better social development. Most kittens reach sexual maturity at seven months and full adulthood by one year.