
Before adopting a dog, surely, you are interested in knowing more or less its size, since it is not the same to live in a chalet than in a small apartment where the space may not be large enough for a medium or large dog. Veterinarians are the ones who will come closest to the measurements that dogs will achieve, especially mongrels, since it is more difficult to know how much they will grow because there are no specific standard measurements as there are in purebred dogs.
If you have or are going to have one and want to know when does a dog stop growing, keep reading because in this oneHOWTO article we will tell you about it.
When does a dog stop growing – the answer
If you wonder at what age do dogs stop growing you will like to discover that these stop growing between 6 and 24 months. In smaller breeds this happens earlier and in giant breeds it happens later.
A form of know if your dog will not grow anymore It is with the arrival of heat in females or the interest / attraction of males for females. Therefore, when a dog reaches the sexual maturity it can be said that his physical growth is about to end. You can see that your dog grows a little more or fattens a little more, but his size will be practically adult at this time.
In purebred dogs, it is easy to determine the size they will reach since it is enough to look at information about the characteristics, such as weight and standard measurements of their breed, to be able to get an idea of when they will stop growing. On the other hand, in mongrel dogs it is where finding out this is a bit complicated, so later we will show you how to discover how much it will grow by getting close to reality.

When does a mongrel dog stop growing?
In the case of wanting know the size of a mongrel dog It is not so easy to find information, unless you know the mix of breeds, find out about their sizes and take into account that the dog will have a size similar to these. In case you do not know the mixture, you can follow these tips.
Yes you know the parents of your puppy it is a bit simpler to determine the size of your dog when buying the two adult dogs. Otherwise, there is a technique that relies on go weighing the dog to assess a slowdown in weight, which will indicate that your dog is about to reach its maximum size.
Maybe once, having a mongrel puppy, you have wondered “Will my dog grow a lot?“Well, during the first weeks of your dog’s life, you will see that it develops very quickly, but there comes an age when this growth slows down, which means that there is little left for its adult size. Depending on the final size that the dog will have. dog, these are the months in which its growth slows:
- Mini and small dogs: 3 months.
- Medium dogs: 4 or 6 months.
- Large dogs: 6 months.
You asked yourself “how to know if my dog will grow bigger? “And now, with these indications, you can weigh your dog periodically to be able to include him in one of these 3 groups, it depends on when his weight slows down to get closer to how much he will grow.
How to calculate the size of a dog – tips
If your dog is of an unknown breed and, in addition, you have not seen which dogs are the parents, determining their size is complicated, but there are a number of tips that you can take into account to approach this result. Follow these tips to know if your puppy will grow more or not:
- If you know the parents of the puppy and the size of these two is the same or very similar, the puppy will be very similar in size to these. Although you can find differences in size in the litters, especially if the parents are of different size.
- The paws of the puppies they can guide you towards a certain size, although it is not very reliable because it is not always the case. Regardless, a puppy with wide legs is likely to be medium or large in size.
- When a dog reaches 6 months it will be reaching its final size or will have already reached it. Therefore, over 4 months it will be about half its size, although this varies according to small breeds, those that will reach it earlier and the large breeds that will reach it later.
Here we talk more about How to know if my dog will be big.

At what age does a puppy become an adult dog?
The definitive growth of a dog is normally associated with the period in which a puppy passes into adulthood, but you should know that this is not always the case. The step from puppy to adult varies depending on the maximum size your dog reaches. So if you wonder at what age does a dog stop being a puppy keep reading these lines.
- In large or giant breeds, dogs will not stop being puppies until they are 18-24 months.
- In medium breeds, between 10 and 25 kg, sexual maturity will occur and they will stop being puppies between 8-9 months, although they are usually considered puppies until they are 12 months, mainly because of their behavior.
- In small or mini breeds they cease to be puppies at 6 months and sexual maturity coincides in this period.
It must be borne in mind that even if a dog has reached its maximum size, it can continue to be considered a puppy for a while, it is a matter of its attitude or behavior and some physical traits.
Now that you know when do dogs stop growing, You may be interested in knowing How to take care of a puppy and When to start training a puppy.
If you want to read more articles similar to When does a dog stop growing?, we recommend that you enter our category of Pets.