When Will My Cat Reach Full Size?

By Moses Wright

Many kitten owners may ask, "When does a cat reach full size?" Kittens have different growth rates and reach maturity of different times depending on the cat breed of the kitten.

Most domestic shorthair kittens, including American shorthair kittens, reach full size within the first three years and often within the first two years. Several cat breeds also mature within this time frame, but some mature much faster or slower than this general timeframe.

The Singapura kitten matures rather quickly. A Singapura kitten usually reaches full size at fifteen to twenty-four months of age.

Somali kittens reach full size when they are about eighteen months old. Kittens of the Chartreux cat breed are adult size when they are about three years old.

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.

The Chausie cat breed is a hybrid of domestic cats and jungle cats. Chausie kittens reach full size when they are two to three years old. American Bobtail kittens also take up 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.

Some cat breeds have similar maturity timeframes as the Ragdoll kittens. Turkish Van kittens can take three to five years to reach full size. Though it may take up to five years, Maine Coon kittens usually reach full size in three to four years.

Norwegian Forest cats are a slow-maturing cat breed. The kittens may be four or five years old before they reach adult size. Siberian kittens may take five years to reach adult size.

Besides size, a kitten may have other physical changes as it matures. Kittens of the Egyptian Mau cat breed may be born with amber eyes, but the eyes turn green within eighteen months. Coat changes in color and texture are common among different cat breeds.

Kitten owners should not wait until a kitten is completely mature before spaying or neutering the kitten. A delay of spaying or neutering can lead to undesirable behavior, unwanted kittens, and an increase in some cancers for female cats. - 29956

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