When Are Russian Blue Cats Fully Grown | When Do They Stop Growing?

When Are Russian Blue Cats Fully Grown

It is okay to wonder when your Russian blue cat will attain its maximum weight, height, and size. And how can you know when are Russian blue cats fully grown? When will these Russian blue cats stop growing? What are the factors that influence the growth of Russian Blue cats?

Russian blue cat reaches adulthood after 12 to 18 months if given proper care, attention, and diet. These cats nearly stop growing after 12 months but they continue to grow little at a slow pace. There is also an exception where they take full four years to grow fully and attain their maximum size.

Diet, genetics, care, attention, and games play the main role in the growth of Russian Blue cats. if they don’t get an adequate amount of food and nutrients or have some hereditary issues, they can remain short for a lifetime.

Let’s dive in to know the detailed study about the growth of Russian Blue Cats and what factors influence their growth rate. What are the dos and don’ts with Russian blue cats?

Russian Blue Cats Growth: An Overview

You need to know what are Russian blue like, how much is their average height, weight, and size to know if they have grown fully or not.

It is quite impossible to know at what point these cats stop growing as they are continuously growing at a slow pace.

But once they reach the average size, it will be easier for you to decide.

Average Weight

Russian Blue cats can grow up to 7 to 15 pounds when they reach adulthood. But overfeeding and inadequate exercise can make them sluggish and fat as well as the growth can be inadequate.

Average Height

These cats can reach a height up to 10 inches when they hit their adult size if no factors are holding them back.

Average Size

The size of the Russian blues varies between males and females as the females are shorter than the male species.

They are medium-sized pedigree with a long and elongated body yet they are relatively muscular with their slender and elegant body structure.

When Are Russian Blue Cats Fully Grown?

Most of the time you can’t know when your Russian blue will attain its maximum adult size and won’t grow further.

These cats reach their adult size within 12 months to 18 months and will probably stop growing after that.

But there is the slightest possibility of slow pace growth after 12 months too that can be too small to get noticed.

Small Russian Blue kittens grow way faster for the first weeks where they nearly double their size. They tend to attend the average size i.e., medium size after a few months if they are well taken care of.

These Russian blue kittens require adequate nutrients and food with high calories to stay healthy and fit. They will reach an average size with no issues unless these kittens are suffering from certain health problems.

When Do Russian Blue Cats Stop Growing?

If we keep aside a few exceptions and let sit the unnoticeable growth, these cats stop growing after 12 to 18 months.

Once they reach their adult size, their growth pace slows down making it nearly impossible to see unless you keep a tab on every month.

There is, however, a chance that some cats might take a whole load of four years to attain their adult size making it hard for the owner to know what’s going on.

It is quite normal if your Russian blue still shows a slow growth rate. They can lose or gain weight and fur making themselves look smaller or bigger respectively.

But let’s not confuse obesity or malnutrition with the size of the cat. It is like judging a man with 5 feet saying he got taller when he put on some weight. That’s irrelevant, isn’t it?

The weight and size are completely different aspects of growth, cats can get fat but their size remains the same.

Factors That Influence The Growth Rate Of The Russian Blue Cats

Various factors can contribute to the growth of the Russian Blue Cats:


Well, nature is quite unfair with all the gender quality as the male species of the Russian blues are larger than the female cats.


The size of the parent cats is directly proportional to the size their offspring will attain. If the parents are bigger in size, then the kittens will also grow up to be a bigger version of Russian Blue.


Inadequate diet not only affects the growth rate of human babies but also the kittens. Appropriate high-quality food when provided in time or with a consistent routine will make your cat grow into its healthier version.

This will not only ensure optimal growth but also prevents the cats from malnutrition or obesity.

Internal Parasites

Parasites are simply in the body of the cat to suck away all the nutrients these kittens consume. Worms or any other parasite will feed off on the vitamins and minerals making it hard for the cats to obtain any of the nutrients.

Improper nutrients and an inadequate diet can hinder the growth and health of these small kittens.

Health Issues

If these cats have hereditary or pre-existing health complications then they tend to get weak and small. Improper posture due to the complications in the bones and joints can make the cat’s growth minimal.

Things You Need To Do To For The Growth Of Your Russian Blue Cats

If you want your cat to attain the height, weight, and size fully without any hindrance, you need to make sure they are getting everything they need for the proper growth.

Here are the things that you should monitor and look closely for helping your cats to grow:


There are few nutrients that must be included in the diet of the Russian blue to make them grow well without any issues.

Animal Protein

Amino acids from the meat cats consume help them to develop various organs, bones, and tissues. You can easily provide animal protein from various meat sources like chicken, beef, fish, and sometimes turkey.


Cats, as human beings, require various vitamins for various purposes in the body.


Function in the body


Robust immune system


Metabolism of carbohydrate and energy


Healthy growth


Good vision

It also asks for other vitamins like vitamin K for various purposes.


Minerals help to transport oxygen and create necessary enzymes in the body of the cat. These minerals also help to use and utilize nutrients as well.

That’s why make sure you feed your cat that food that has enough minerals to ensure its proper growth.


You may know cats love fish but did you know most of the fatty acid they need for their body is present in the fish?

Fatty acids like omega 3 and omega 4 are the good fats that cat requires in their diet. These fats help the cat to regulate body temperature as well as gives energy.

They also help the cat to absorb vitamins like A, D, E, and K.


Most of the bodily processes that are connected to the growth of the cat depend on carbohydrate intake. Carbohydrate also helps the cats to get the energy required for doing every small activity.

The best way you can make your cat attains its required carbohydrate demand is by feeding the food made with wheat, oats, barley, and rice.


You need to make sure your cat is not dehydrated. Every cat hates drinking water so it comes down to you to make them drink water or feed them wet food. So, know how much water should Russian blue cat needs to drink in a day?

Water helps to eliminate the toxins as well as maintain body temperature while distributing and metabolizing nutrients.

So, your cat needs to drink adequate water to gain optimal and healthy growth.


Russian blue also requires calcium in their diet or else their bone will get softer and weak. Other nutrients like potassium, zinc, sodium, iron, and magnesium also help the cat during its growth phase.


You have to take care of your cat’s diet, feeding schedule, grooming, hygiene, etc. to help them grow properly.

You have to monitor closely if they show any symptoms of common cat diseases as these diseases can hinder the growth process.

They are ought to lose their appetite making themselves push towards their downfall and bad health.

Moreover, learn the ultimate guide to care for a Russian blue cat.


The lazy, obese cat will never attain its full growth if it doesn’t get up from its bed and do exercises. An active body with proper nutrients will attain its adult size faster and will continue to grow into a healthy cat.

You need to give your intelligent cat activity that makes them work their brain as well as body. The blood circulation and oxygen supply are adequate in the body when the cat is playing around. So, learn some tips and tricks to train your Russian blue cat.

Spaying And Neutering

Spaying and neutering extend the growth phase and time of the cat as these procedures help the cat to grow after 12 months as well.

But there is a slight difference in the growth depending on when the procedure is done. If you spay or neuter your cat in their early stage of life, they tend to grow bigger in length and girth.

However, if the procedure is done after they attain adulthood, these cats will grow into their natural size.

Factors That Can Hold Back The Growth Of Russian Blue Cats

When you learn about the average size your Russian blue is ought to grow and can’t see it, you begin to question yourself. Are Russian blue small cats? Why is your Russian blue small? What is stopping them to reach their average size?

Russian blue is a medium-sized cat and will only stay small if something is hindering their growth. It can be genetic or sometimes it is just your cat taking its time to grow into maximum size.

Don’t panic and start to compare your cat with others, it is not a wise thing to do. There can be some complications that are stopping your cats to reach their maximum potential.

There are various factors that can hinder the growth of Russian blue cats if you are not careful enough.

Insufficient Diet

If your Russian blue is not getting appropriate and adequate nutrition, there is a chance that they will not grow properly.

Nutrition plays a key role in the development of any living being and if it is not sufficient enough, there’s no question to be asked.

There are simple instructions on when and how to feed your Russian blue cat unless you skip the induction part.

It comes down to you to research properly and feed your cat quality food at a scheduled time.


You don’t need an explanation of how a disease can play a key role in the growth rate of cats. There is no doubt that any disease present in the cat’s body can make it lose weight along with its capacity to grow properly.

Worm infestation is one of the most villainous diseases related to the growth of the Russian blue. It makes these cats lose weight, vomit, diarrhea, and even loss appetite. Besides, there are also other Russian blue cat diseases that you need to look after.


If your cat has inherited any disease such as hyperthyroidism, dwarfism, bone deformities, or diabetes, then you’ll clearly see the consequences in its growth.

It is not your fault when your cat can’t grow due to issues with its genetic. They tend to remain small and will even look like kittens throughout life.


If your cat just sits idle and doesn’t play around, its body starts to give up on the growth hormone as the brain isn’t actively involved in any activity.

A well-trained and well-fed cat always looks larger than the cat that sits idly and does nothing. You need to make your cat play puzzles and other kinds of stuff as Russian blue is one of the smartest and intelligent breeds. So, train your Russian blue cats from time to time to make them healthy and fit.

Frequently Asked Questions

You may come across the FAQs that are mentioned below along with their answers.

How Big Will A Russian Blue Cat Get?

Russian blue cat can grow up to 10 inches tall and can weigh 7 to 15 pounds.

Are Russian Blue Cats Cuddly?

Yes, if they are in a good mood and you are their favorite human friend, then they will cuddle with you. These cats are very affectionate yet not clingy.


In conclusion, if you care about the well and they have no pre-existing disease, these cats will grow to their optimal size with no issues whatsoever. You have to feed them properly and take care of their every small needs to make them grow well. As long as you monitor them closely and pay proper attention within the first year of their life, they will reach their average height, weight, and size. Don’t overdo anything and make sure your cat is healthy and disease-free.

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