When Do Cats Stop Growing?

small baby kitten

If you are going to adopt a cat, it is important that you know when it stops growing. 

The growth rate of your cat will affect a lot of things, including how and what you feed them. This article will help you get the necessary information to take better care of your kitty.

Maximum Growth of Cats

A kitten will typically keep growing until it is around six to twelve months old. There are cats that don’t stop physically developing and growing until they reach 2-4 years of age, though this is fairly uncommon.

Just because your cat is a year old doesn’t mean that it won’t grow anymore. There is no telling how big they will get if kept on a high-fat or high-carb diet.

Many cats can become quite obese, which is not good for their overall health. There are lots of medical problems that an overweight cat can develop, including diabetes. This compromises their immune system, which makes it difficult for them to stay healthy overall.

Average Cat Size

The fact is that some cat breeds are naturally larger than others. For example, the Maine Coon can weigh up to 20 pounds without being overweight. It is important to consider the breed of your kitty when you are trying to determine when it will stop growing.

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Growth Milestones

There are certain key milestones that cats hit as they get older. It is important that you are familiar with these milestones so you know your cat is developing normally.

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1. Three to Four Months

When a kitten is three to four months old, its baby teeth begin falling out. Around this time you will notice their adult teeth coming in. Your cat should have all of its adult teeth by the time it is six months old.

2. Four to Nine Months

At four to nine months of age, a kitten will become sexually mature. This means that females are capable of going into heat. These animals can successfully mate with each other at this life stage.

3. Nine to Twelve Months

When your cat is nine to twelve months old, they are pretty close to being completely mature.

4. One Year

Once your cat is a year old, they may be fully matured and will no longer continue to grow.

5. 2+ Years

Pretty much all cats stop growing and developing physically once they have reached two years old.

blue eyed kitten

Factors to Consider

As we mentioned above, there are a few different factors that affect when a cat stops growing, including:

  • Breed: Smaller cat breeds like the Devon Rex typically stop growing once they are six to twelve months old. Larger breeds like the Maine Coon or Norwegian Forest Cat can keep growing for up to 2 years.
  • Diet: A nutritious and well-balanced diet is crucial for the normal development of felines. If your cat has one or more nutritional deficiencies, it might take them longer to grow to their full size.
  • Intact or not: Cats that have been spayed or neutered tend to get bigger than intact cats, especially when this is done at a young age.
  • Medical conditions: There are various genetic conditions that can also affect the growth rate of a cat. One example of this is dwarfism, which is only seen in a very small percentage of these animals.
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Keeping Track of Your Cat’s Weight

If you want to know when your cat has stopped growing, you should make a point of tracking its weight from an early age. This is an easy and effective way to get this information. You should weigh and measure your cat one time each month.

You can use a cat’s weight to tell their age as well. While this method might not be completely accurate, it can give you a better idea as to just how old your kitty is. Take the weight of your cat at sixteen weeks old and just double it. This will give you a good idea as to just how big they are going to get once they are fully matured.

Feeding Your Cat

You can usually start giving your cat adult cat food when it reaches one year old. Some cats can be given this food when they reach ten months of age. It is important that you keep them on a nutritious diet that meets all of their dietary needs on a daily basis.

Cats that are under a year old should generally be given food that is specially formulated for kittens. This will help them to grow and develop normally so there aren’t any issues whatsoever. The diet that you put your cat on will play a very important role in their overall development from the time they are born.

Emotional Maturity

Most cats stop maturing emotionally when they are around six months old. This is when you will likely notice your cat’s behavior becoming less erratic, so dealing with them will be much easier. Kittens can definitely be cute, but they are also a handful. The average cat reaches full social maturity before it stops growing.

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  • While the average cat stops growing at around 12 months old, there are some that continue developing physically until they are two or even four years old.
  • When a cat is three to four months old, their baby teeth start falling out and their adult teeth come in.
  • A cat that is nine to twelve months old is very close to being physically mature.
  • Most cats that are over a year old have reached peak maturity and are no longer growing physically.
  • There are lots of things that can affect the growth rate of a cat, including the breed, certain medical conditions, and whether they have been spayed or neutered.
  • Giving your cat the right food on a daily basis will help to ensure a normal growth rate.
  • Most cats reach peak emotional or social maturity at about six months of age.