Brittany Spaniel Weight Chart – Brittany Size & Growth Chart

Brittany Spaniels are cherished by dog owners on both sides of the Atlantic because of their beautiful energy and agility.

A distinctive feature about Brittany Spaniels is that they require a lot of exercise, and they prefer to do this with the humans they love.

If you are one of these humans and then a Brittany Spaniel weight chart would be helpful to you when it comes to tracking your dog’s progress.

Brittany Spaniels have bold patterns in a variety of combinations. Many people like their alertness and strong, rugged demeanor.

Their versatility and zeal are unmatched making them great hunters and sport dogs. They are also trainable and obedient, so they can blend well with your family. 

When Is A Brittany Spaniel Fully Grown?

When Is A Brittany Spaniel Fully Grown

You may be wondering about the age of a full-grown Brittany Spaniel. Well, the truth is that Brittany Spaniels are usually fully grown when they are about 1 year to 16 months.

This may vary slightly for different dogs since no two dogs are the same. For some dogs, it may be a year and for others, it may take as long as 16 months. Many factors influence this.

Another interesting fact about Brittany Spaniels is that there are no significant differences between the size of males and females throughout development.

They fall into the medium-sized dog category, and they have smaller frames than setters, but larger legs than your typical Spaniel.

Usually, when the Brittany Spaniel is a smaller dog, they can reach full development earlier than one year, but this is not very common.

They are sturdy and enthusiastic. If you give them the exercise and nutrition that they need, it can also affect their eventual size.

Brittany Spaniel Weight Chart

This is a useful Brittany Spaniel growth chart to track the progress of your Brittany Spaniel.  It works by listing the average weight measurements of Brittany Spaniels through research on this breed.  

Remember that this is to be used as an estimation because there may be considerable variance based on your Brittany Spaniels level of health, nutrition, activity level, and genetics.

All of these factors can determine the weight of your dog as well as the way he develops. So think of this size chart as a reference for your dog’s progress.

It works by matching the age of your dog, with the weight that he would typically be. So to use this chart properly, you need to have information about his correct age throughout his development.

You may notice that the weights mentioned do not match your dog’s weight, but this is no cause for alarm because as a dog owner you may be the best person to determine health as you are there to monitor.

However, if you are unsure about anything, and you feel that your dog is overweight or underweight then you should seek the advice of a veterinarian who would be able to tell you for sure. 

Brittany Spaniel Puppy Weight Chart

AgeWeight (lbs)Weight (kg)
3 Months13 - 16 lbs5.9 - 7.3 kg
4 Months17 - 21 lbs7.7 - 9.5 kg
5 Months20 - 25 lbs9 - 11.3 kg
6 Months23 - 30 lbs10.4 - 13.6 kg
7 Months25 - 32 lbs11.3 - 14.5 kg
8 Months26 - 33 lbs11.8 - 15 kg
9 Months27 - 35 lbs12.2 - 15.9 kg
10 Months28 - 36 lbs12.7 - 16.3 kg
11 Months29 - 37 lbs13.1 - 16.8 kg
12 Months30 - 38 lbs13.6 - 17.2 kg
13 Months30 - 38 lbs13.6 - 17.2 kg
16 Months30 - 40 lbs13.6 - 18 kg

Brittany Spaniel Growth Chart – What To Expect

Brittany Spaniel Puppy Growth Chart

Birth – 2 Weeks 

When Brittany Spaniels are born, they are in a sensitive state because they are not developed. Since they are not fully functional, they need help from their mothers or owners if they are rejected by their mothers.

Their eyes are still closed shut, and they do not have the full hearing capacity, but they can taste their mother’s milk and smell it.

Expect that they would spend most of their time sleeping as they gain their strength. Their muscles will also be undeveloped, so they won’t have much movement.

3 Weeks – 12 Weeks

During this important phase of your Brittany Spaniels life, you should make every effort to ensure that they have everything that they need.

This is a time when the weaning from their mother’s milk occurs, and it can be difficult for some puppies to adjust.

Remember that their mouths are small and tender so starting to consume solid foods may be difficult for them. But they still require adequate nutrition so make this food soft and liquid-like, to begin with.

It should be like the consistency of mashed potatoes or a thick soup. However, it should not be too hot as it can scald their mouths.

Keep these things in mind. during this stage. Usually,  at the end of this stage, the females weigh about 13 to 16 lb clear.

4 Months – 9 Months 

You may have a growth spurt during this stage because of the food you are giving your Brittany Spaniel as well as their lively and energetic personality.

The extra movement counts as exercise that will help them to develop strong muscles and bones.

Continue to feed them nutritious food that is high in protein. During this time you can expect your Brittany Spaniel to weigh approximately 23 to 30 lb.

Brittany Spaniel Puppy Weight Chart

10 Months – 18 Months 

Right now you should have a fully grown Brittany Spaniel on your hands. They are usually fully developed between 12 to 16 months.

Keep in mind that they are a medium-sized breed. Some of them continue to gain a bit of muscle even after 16 months.

The one-year mark male Brittany Spaniels usually weigh between 30 and 40 lbs.      On the other hand, their female counterparts usually weigh around 30 and 38 lbs.


You can expect that your Brittany Spaniel will be coming into his adulthood in ways that are more than just his looks.

He will typically stop looking like a puppy because he won’t have larger paws anymore and his head will be more proportioned to his body.

But he may be less playful even though he still requires a lot of exercise. You may have noticed that there is not much difference between males and females when it comes to Brittany Spaniels except when they reach adulthood.

In adulthood, the males are slightly larger, but the difference is insignificant. Because of this, you may notice that females reach adulthood faster. 

How Big Do Brittany Spaniels Get? 

Brittany Spaniels grow at different rates, so it may be a bit challenging to know how big do Brittany Spaniels get.

But there are a few methods that you can use to figure this out. One of the easiest ways that you can learn this is by referring to the growth charts within this article.

You also have the option to consult with your breeder and find out about your dog’s parents. This is a good way to find out how big your Brittany Spaniel will grow to be because dogs usually average between the size of both their parents.

If you have the funds, you can also look into getting a DNA test done so that your Brittany Spaniels genealogy can be properly ascertained.

In this way, if there are any other breeds in your dog’s ancestry then you can put this into consideration when making your prediction.

Your dog’s paws are also a method of figuring out what their eventual size will be because their paws are said to be bigger while they are still developing, and they grow into them in adulthood.

Will Neutering/Spaying My Brittany Spaniel Affect His Growth? 

It may be a good idea to wait until your Brittany Spaniel is at least 18 months before you look to have a spaying or neutering procedure done.

This is because doing this before they have completed their growth fully can seriously affect them. The male dogs in particular tend to suffer from joints related issues.

However, there are upsides to having your dog spayed or neutered. For example, you can prevent unwanted pregnancies as well as have a less aggressive dog.

Brittany Spaniel Development

There are also a host of diseases that can be avoided when your dog is spayed or neutered like cancers and other issues related to their health.

You should also take into consideration that surgeries come with a level of risk and there should be time and care given to Brittany Spaniels who have this surgery performed on them. 

Brittany Spaniel Height Chart 

You will be better off if you consistently monitor your Brittany Spaniel. You can do this by measuring their height as they grow.

It is a simple process to measure your Brittany Spaniel correctly. The height is taken from the ground up to the highest point of your dog’s shoulder blades which is referred to as the withers.

Simply measure from the ground to the withers and record this measurement for future use. 

Cocker Spaniel vs Brittany Spaniel Size 

Brittany males and females usually weigh around 30 to 40 lb and stand at 18 to 21 inches in height.

The cocker spaniels, on the other hand, have slightly different sizes for males and females. The males usually weigh between 28 to 34 lb while their female counterparts weigh between 26 to 32 lb.

When it comes to height, the males usually stand at 16 to 17 inches while females stand at 15 to 16 inches in height.

You may notice that the differences are not significant even though the cocker spaniel males are a bit larger in adulthood. 

Factors That Affect Brittany Spaniel Growth 

Genetics & Gender

Gender plays a role in your Brittany Spaniels growth especially in the case of neutering the male. The growth is affected because of the testosterone hormones.

This is not so with females. Genetics also play a role in their growth because they usually follow in line when it comes to their parents’ size. These genetic traits are passed on to them.


Ensure that you give your Brittany Spaniel dog food of high quality for development that is smooth and without delay.

Make sure that you adjust the diet in terms of their rations throughout your dog’s lifespan because the food that you will give a puppy is not necessarily the food that you should be giving a senior dog and vice versa.

Brittany Spaniel Weight Chart

Even though Brittany Spaniels are not prone to being overweight, because of their natural inclination to exercise, you should still monitor them. Your Brittany puppy should always have clean fresh water available for him to drink throughout the day.

Physical Activity & Health

Brittany Spaniels were bred for hunting which is why they require high levels of exercise. They make great hunting companions and would love to go running with you.

Just make sure that they are properly hydrated on hot days. 1 to 2 hours per day is the minimal amount of exercise required to make them happy. they should be mentally stimulated when they are not active.

What If My Brittany Spaniel Is Not The Right Weight

Many people are unsure about whether their Brittany Spaniels are the right weight. This is because they are a medium-sized breed, but they may appear to be too small or large to some.

There are a few ways that you can ascertain that your Brittany Spaniel is the right weight.

You can use the Brittany Spaniel weight chart within this article to guide you while your puppy is still developing but when they are in adulthood they usually weigh about 30 to 40 lb.

However, there may be some variance based on your Brittany Spaniels lifestyle and level of health.

If you are unsure you can use a BCS score which is likened to a BMI calculation, but for dogs. A BCS score will be able to pinpoint certain features of your dog’s anatomy to tell whether he is overweight or underweight. 

For example, when you run your hands along his rib cage you should be able to easily feel his ribs. If you cannot, and you only feel fat then you know that he is overweight.

On the other hand, if you can visibly notice his rib cage without even touching him then he is too thin.

Brittany Spaniel Genetics And Common Health Problems

Brittany Spaniels are usually healthy dogs and do not suffer from many hereditary diseases. But they may have issues like eye disease and hip dysplasia which are common with most breeds.

You should also check their ears regularly to remove wax buildup or other foreign matter. It would be good to have their teeth cleaned as well.

Brittany Spaniel Growth Chart

There may be some Brittany Spaniels who suffer from a condition called hypothyroidism which is a condition resulting from an underactive thyroid.

Whenever they have this condition, it may cause them to be lethargic and may even cause obesity. Obesity then results in issues with their joints. Proper nutrition is important for good health. 

Final Words

Owners of Brittany Spaniels are usually pleased that this breed requires only minimal grooming. You can brush them once per week to help with shedding and to maintain their beautiful coats.

You may also employ the services of a professional groomer to assist with their upkeep.

A professional groomer will be able to properly cut their nails and parts of their coats. This may be done at a monthly frequency for good results.

Brittany Spaniel’s are intelligent which means they are trainable. This combined with their exuberant energy makes them willing to participate in training exercises.

With all training, there needs to be patient and kind encouragement on the part of the trainer. Socialization for your dog will also go a long way to install proper behavior.

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