Kitten owners may wonder when does a cat reach full size. Kittens of different cat breeds mature at different rates.
A general guideline for the maturity of domestic shorthair kittens, including American shorthair, is that they reach full size within the first three years, but often within the first two years. Some cat breeds mature much faster or slower than this.
The Singapura kitten matures rather quickly. A Singapura kitten usually reaches full size at fifteen to twenty-four months of age.
Chartreux kittens reach full adult size when they are about three years old. Kittens of the Somali cat breed are about eighteen months old when they reach full size.
Most Bengal kittens reach full size by the time they are three years old, but some take slightly longer. Savannah kittens typically reach full adult size in two to three years.
American Bobtail cats may be three years old before they reach full size. A hybrid of domestic cats and jungle cats known as Chausie cats can take two to three years to reach adult size.
Ragdoll kittens usually reach full size when they are three to four years of age. Some Ragdoll kittens may take as long as five years to reach full size.
Like Ragdoll kittens, Turkish Van kittens can take three to five years to mature. Most Maine Coon kittens reach full size in three to four years, but may take up to five years.
One of the slowest maturing cat breeds is the Norwegian Forest cats. The Norwegian Forest kitten may take four to five years to reach full adult size. Siberian kittens may be five years old until they reach adult size.
Some cat breeds go through other physical changes besides size while they are kittens. Egyptian Mau kittens may be born with amber eyes, but the eyes turn green by the time the kitten is about eighteen months old. Many cat breeds experience changes in their coats and coloring as they mature.
Neutering or spaying a kitten does not need to wait until the kitten reaches full size. Undesirable consequences can occur if spaying or neutering is delayed. Waiting to spay a female kitten increases its risk of mammary cancer. Male cats are more likely to develop spraying behavior if not neutered while young.