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When Do Cats Stop Growing? Understanding Cat Growth Stages

As cat owners, it is natural to be curious about our furry companion’s stages of life. One question that often lingers in our minds is: how old are cats when they stop growing? From tiny, playful kittens to mature and graceful adults, cats undergo remarkable transformations as they grow. Understanding the growth stages of cats not only deepens our connection with them but also enables us to provide the best care tailored to their evolving needs.

In this blog, we will shed light on the growth stages of our feline companions and provide you with valuable insights into when cats typically stop growing.

Growth Stages of Cats

The Kitten Stage

The kitten stage is an adorable and crucial period in a cat's life. It starts from birth and typically lasts until around 1 year old. During this stage, kittens undergo remarkable transformations. Kittens are born blind and deaf, which makes them naturally reliant on their mother for nourishment and care. The senses of a growing kitten develop each day as they grow, allowing them to explore the world around them.

Kittens experience rapid growth and undergo significant physical and behavioral changes during their first few weeks. They usually open their eyes between 7 to 14 days after birth, and their hearing gradually improves as their ears start to uncurl. Kittens also start walking and developing coordination skills in this stage. This period is when they begin teething as well, which can lead to nibbling and chewing behaviors. Cat-friendly furniture is especially useful for young cats in particular, who tend to scratch and play, and are more likely to damage household furniture.

The Juvenile Stage

After the kitten stage, cats enter the juvenile stage, which typically spans from around 4 months to 1 year old. During this phase, cats continue to grow but at a slower rate compared to their kitten days. Their bodies become more proportionate, and their features start resembling those of adult cats.

In the juvenile stage, cats become more independent and adventurous. They develop their hunting instincts, explore their environment, and engage in play behavior to refine their physical abilities. This stage is crucial for their socialization, as they become more interactive with other cats and humans.


Once cats reach adulthood, they have completed their major growth phase. By this stage, their physical features have matured, and their size has stabilized. Adult cats exhibit behaviors typical of their breed and display a calmer demeanor. Providing ongoing care, nutrition, and love ensures their well-being throughout their adult years.

When Do Cats Stop Growing?

Now, let's address the burning question: when do cats stop growing? Most cats reach their adult size and weight by 1 year old. By this time, they have undergone the majority of their growth spurt and have developed their adult body proportions. Another factor to consider is gender, as that can have an effect on the timing of growth between a male cat and a female cat.

When do male cats stop growing?

On average, male cats reach their adult size and weight by around 1 year of age. This is when they have gone through the majority of their growth spurt and have developed their masculine features.

It's important to note that individual male cats may exhibit variations in their growth patterns. Some larger breeds or cats with a genetic predisposition for a more prolonged growth period may continue growing until they are approximately 2 years old. This extended growth period allows them to develop the size and physical characteristics associated with their breed.

When do female cats stop growing?

Female cats generally follow a similar growth trajectory as male cats. Most female cats reach their adult size and weight by around 1 year old. However, just like males, some larger breeds or cats with genetic influences may continue growing until they are around 2 years old.

Some female cats experience growth spurts and changes related to their reproductive cycles. During the onset of puberty, which typically occurs between 5 to 9 months of age, female cats may exhibit accelerated growth. This is a natural part of their development as they prepare for their reproductive capabilities.

Regardless of your cat’s gender, it is important to monitor your cat's growth progress and consult with a veterinarian if you have any concerns. Veterinary professionals can provide the best guidance based on your cat's breed, individual characteristics, and overall health.

3 Factors Affecting Cat Growth: Unraveling the Secrets

Numerous factors influence the growth rate of cats. Let's take a closer look at the key elements that play a role in determining when cats stop growing:


Different cat breeds have varying growth patterns and sizes. Large cat breeds generally take longer to reach their full size compared to smaller breeds. For example, small and medium-sized breeds like Siamese cats tend to reach their full size at an earlier age. Meanwhile, larger cat breeds like Maine Coons are known for their slow and steady growth, often taking up to 4 years to reach their maximum size.


Genetics plays a significant role in determining a cat's growth rate and final size. The genes inherited from their parents influence their growth potential. A cat is more likely to grow bigger if it comes from a lineage of large cats, compared to cats with smaller genetic backgrounds.

Overall Health

A cat's overall health can also impact their growth. Kittens that suffer from underlying health issues may experience stunted growth or delayed development. Regular veterinary check-ups, vaccinations, and preventive care help ensure that any health issues are detected and addressed promptly, promoting proper growth and development. When it comes to monitoring health, consider PrettyLitter for extra peace of mind. Our silica gel formula changes color and reacts to the pH of your cat’s urine to help you detect early signs of things like cat kidney disease, feline bladder stones, or other cat urinary health problems.

Signs of Cat Growth Completion: Indications that Your Cat Has Reached Adulthood

So, how can you tell if your cat has stopped growing and reached its adult size? Look out for the following physical and behavioral signs:

  • Stabilization of Body Size: Once a cat has stopped growing, you'll notice that their body size remains relatively constant. They will no longer exhibit significant changes in length, height, or weight.
  • Mature Appearance: Adult cats have a more refined and mature appearance compared to kittens. You’ll notice that some features such as the shape of their head, body proportions, and facial expressions have become more fully developed.
  • Development of Adult Behaviors: Cats display distinct adult behaviors as they reach maturity. These behaviors include territorial marking, mating behaviors, and a more settled, independent demeanor.

Caring for Growing Cats: Nurturing Healthy Development

Proper care is essential during a cat's growth stages to ensure their healthy development. Here are some tips to support your cat's growth:


Try PrettyPlease, our premium cat food offering specifically designed to optimize whole-body health. With high-quality ingredients and a focus on wholesome nutrition, you can support the development and overall well-being of your cat.

Veterinary Care

Regular veterinary check-ups are essential to monitor your cat's growth and overall health. Vaccinations, deworming, and preventive treatments should be administered according to your veterinarian's recommendations.

Environmental Enrichment

Create a stimulating and enriching environment for your growing cat. Provide toys, scratching posts, climbing structures, and interactive playtime to encourage physical activity and mental stimulation. Environmental enrichment helps keep your cat engaged, prevents boredom, and promotes their overall happiness.

Love and Affection

Don't forget to shower your growing cat with love and attention. Spend quality time bonding with them, grooming them, and providing affectionate interactions. A loving and nurturing environment contributes to their well-being.

Fostering Healthy Cat Growth and Development

Understanding the growth stages of cats and when they stop growing is vital for cat owners and enthusiasts. Various factors, including breed, genetics, nutrition, and overall health, influence a cat's growth rate. By providing proper care, nutrition, and a loving environment, you can ensure your cat's healthy development.

Remember, if you have any concerns about your cat's growth or development or if you are wondering how to tell the age of a kitten, it is always best to consult a veterinarian for professional guidance catered to your individual needs. Together, we can ensure our feline friends thrive and enjoy a healthy, fulfilling life.


  1. Comfort Zone. At What Age Will My Cat Stop Growing?
  2. Dutch. When Do Cats Stop Growing?
  3. Healthy Paws Pet Insurance Blog. When Do Cats Stop Growing? Reliable Ways to Know When Cats Reach Their Full Size.

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