When Does Your Kitten Become a Full Grown Cat? Things You Need to Know

Your feline friend will always be your baby no matter what age they were and what circumstances might be. Those cute tantalizing eyes, huge head, little body and short limbs definitely makes them really cute. Did you ever wonder, when does kitten become a cat? It is almost certain to happen that one day out of the blue you’ll find your fur baby acting really weird. You’ll find them starting to climb walls and trying to get out of the house every time the door is open. In this period, your little kitten is now experiencing heat stage all throughout the day. Male kittens may start going to your yard and look for female cats. It is important for pet owners to know when their kittens are full grown. It helps them handle their cats in a proper way.


Here are some information that you will know when your little furry friend is already becoming an adult:


Kitten’s gestures tend to change at about 2 months old. You may notice some changes on the way they walk and becoming more adult. They are more likely to walk around like adult cats and do not run just like before. During this period, kittens develop into adulthood. They start to touch and play with different things they see. When this stage happens, their minds are starting to generate and improve. It is important to monitor them during this period for your cat’s safety purposes. 


Development usually occurs between 2-6 months old. During 6 months of growth, kittens may start to appear in medium sized. It always varies on the individual animal. It is necessary that during this stage, feed them with food full of nutrition. Give them a meal rich in protein. Do this 3-4 times a day. Formulated food is also perfect since it consists of nutritional needs to keep them healthier and grow strong making them full adult. After 6 months, owners can give them adult food. It is always best to consult with your veterinarian about this.
Unspayed Female Cats - Unspayed kittens reach their sexual maturity at 6 months of age as well. There are other breeds that experience their first heat at the age of 5 months specifically for Siamese cats. Male cats start to produce sperm at around 8 months of age.

Teenage Years

Kittens about 5-7 months old are considered teenage years. Monitor them properly! Most cats at this age are already reproductive matured. This is where the heat cycles start and male cats engage in mating. There are also cases that other cats reach sexual maturity at the age of 5 months and some take about 7 months and more.

First Year of Age

The first year of age is considered puberty stage. It’s also the same thing as becoming a teenager. There are changes on the physical part which most owners will notice. Transformation in appearance are:

· Growth (height) specially when they are neutered
· More confident in all the things they do
· More likely to recognize their pet owners as their parents
· Physical appearance tends to change especially on the inside part
· Continue to grow after their first birthday into a full size grown adult

Sexual Maturity

As mentioned in the earlier part, some kittens reach sexual maturity at the age of 5-7 months. Others develop between 6-9 months of age. This is where the puberty starts. Pregnancy is possible during this stage especially when female cats are physically developed. These changes are very obvious so it is better to keep them away from male cats. If you plan to have your feline friend neuter or spay, always consult this to your trusted veterinarian and ask when is the best time the procedure must be done. Most vets suggest to neuter or spay kittens before they achieve sexual maturity. Ideally, male cats are being spayed about 6 months of age. 

1 Year and 6 Months

Cats are different from each other. Some mature in earlier stage and others develop for longer times. According to some studies, cats completely grow at the age of 1 year and 6 months. In this period, they are able to call “cats”. They progress physically, sexually and social engagement. The most neutered and spayed cats never show sexual interest. Make them feel that they’re still your baby. 


The lifespan of cats depends on how owners handle their pets. If they are more likely to roam around, expect them to live for about 4-5 years. For indoor cats, the average lifespan is 13-16 years. To be able for your feline friend to live longer, always take them to veterinary and have their medical check up regularly. Get the needed vaccinations yearly and give only nutritional food to maintain their healthy body. It is also important to provide an additional physical activity that encourages playing, walking and running.

Things to Consider

Seeing your feline friend grow is the most unforgettable moment of your life. Record their growth along with their photos. It is always a treasure to keep! As they get older, owners may be able to see the clip of their kittens that are now fully grown and be proud of being there to your lovely friend. In this way, you will be able to enjoy your cat’s first year of life and will continue to love you unconditionally for many more years to come.

About the Author Evelyn

My name is Evelyn, creator of PlaywithMeow!, I created Play with Meow to connect, share and inspire other cat lovers around the world, hoping we all utilize this community to make a better life for our cats.

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