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Home > Cats > At What Age Will a Cat Stop Growing? The Cat Growth Guide

At What Age Will a Cat Stop Growing? The Cat Growth Guide

bengal cat walking on plank outdoor

Cats are mystifying animals. They are tiny and adorable as kittens, but suddenly, they become stout adults that seem to need little support from their human counterparts. Kittenhood does not last that long, and many owners report that kittenhood goes by much faster than they anticipated. So, at what age will a cat stop growing? The short answer is about 18 months of age.

However, this time range can vary depending on the species and environment. There are a few different factors that can affect the development of a cat. Just because a cat grows large does not mean they are an adult, and just because a cat stays small does not mean that they are not fully grown. So, it is a good idea to keep an eye out for signs that your cat is fully grown rather than relying on age.

While veterinarians can help you determine the age of your pet cat, there are multiple ways to know when your cat will reach full size without having to consult them. Here are the ways to know when your cat will reach full size.


Know What to Expect at Each Stage

kitten at home
Image Credit by OlenaPalaguta, Shutterstock

Each stage of life tends to bring upon specific actions and behaviors. Understanding these is an excellent way to determine what stage of growth your pet cat is experiencing.

Here is what to expect during major age and growth periods throughout your cat’s life:
  • Up to 3 Months: These kitties are just beginning to explore adult cat food, both wet and dry. They typically weigh in between 2 and 4 pounds. Most kittens of this age look for human comfort and interaction to feel safe.
  • 3-6 Months of Age: This is usually when a cat goes through puberty. This age typically brings on rambunctious, curiosity, and even aggressiveness. You may find that your kitty likes to attack or grab your legs as you walk around the house, or you might notice that the cat enjoys pawing, gnawing, and striking at anything that moves, including the couch pillows and the bed blankets.
  • 6-12 Months of Age: This is when your kitty becomes a young adult. Your cat may reach full size but does not reach full maturity. Your kitty’s playful nature will likely calm down at this time as a sense of independence is realized.
  • 12 Months to 2 Years of Age: This is when your cat becomes fully mature. You will not notice any growth spurts, and you should notice a more subtle and manageable personality overall. At this time, your cat has established daily life patterns and routines. They know what they want and they know how to establish boundaries. Most importantly at this age, cats are ready to reproduce.

Signs That Your Cat Has Reached Maturity

white cat near food bowl
Image Credit: Pixel-Shot, Shutterstock

Once your cat reaches maturity and stops growing, you can expect them to maintain a regular daily regimen. You should understand when your pet wants to nap, go outside, eat, play with toys, and cuddle, depending on what time of day it is. Of course, there are always exceptions to this rule — cats aren’t robots after all.

Other signs to look for as your cat reaches maturity include:
  • A lack of interest in highly vigorous activities.
  • A diet intake that does not fluctuate much daily
  • A month or more of no noticeable growth

The biggest sign that your cat has stopped growing and has reached maturity is no change in measurements. Consider measuring your cat’s height, length, and weight each week from the time that they are a kitten. When you notice that there is very little or no change in your cat’s stats for at least a month, chances are that your kitty is done growing.

Related Read: How Big Do Bengal Cats Get? (Size + Growth Chart)


Final Comments

The only way to really know that your cat has stopped growing is to wait until they simply grow no more. After a few months of being the same size, chances are that your kitty has stopped growing. Depending on the breed, type of food offered, and health conditions, adult cats can be small and slender or large and robust.

Featured Image Credit: Seregraff, Shutterstock

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