We may not care how much time passes, our kitten will always continue to look like a baby to us. But up to what age is a cat considered a puppy? From when can we consider our cat a full-fledged adult? You are here to know “At what age is a cat fully grown?” In this post, I will tell you.

At what age is a cat fully grown?

A cat has fully grown up to 12 months of life, in fact, the cat grows both physically and mentally until it becomes an infant, an adolescent, up to an adult. Cats go through various stages of the growth process, changing a lot in both physical appearance and maturity and temperament.

Each phase is unique and in this article we discover them to understand up to what age a cat grows and when it can be considered an adult. For the other breeds (most), however, growth is a gradual path that takes place until the end of adulthood.

The growth of the cat according to the age

Some cats do not grow in a “traditional” way but slowly grow to a large size, such as the Maine Coon or the Norwegian Forest Cat.

Of course, during the rest of our life, there will be other changes in our cats. But they will be less noticeable and more gradual.

Hence, physical development (of the bone, muscle, and sexual structure) occurs in the first 9 months of age. And up to 12 months of age, the cat grows to adulthood. In fact, at that moment, its size, appearance, build, and all the physical characteristics of our cat will be defined.

What is the average life of a cat?

The average lifespan of a cat is between 14 and 16 years, in some cases even more. Considering that their life expectancy is much shorter than that of humans, the owner often faces old age and the death of the cat.