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At What Age Is a Cocker Spaniel Fully Grown?

If you have a Cocker Spaniel puppy, there are probably many things you’re wondering regarding their growth and development.

It’s normal to wonder when your Cocker Spaniel is going to be fully grown because you want to know when you expect them to be their full size.

You also want to be sure they are growing at the right rate and developing correctly. 

At What Age Is a Cocker Spaniel Fully Grown?

Most Cocker Spaniels are fully grown by the time they reach 18 months. Some may be fully grown before then depending on if you have an English Cocker or an American Cocker. You can expect your dog to not grow much once they reach about a year and a half old though. 

You might still have some questions regarding how big your Cocker Spaniel will get and how much you can expect them to grow when they are young. 

We will discuss what you can expect when it comes to your dog growing and developing. 

How Big Do Cocker Spaniels Get?

A Cocker Spaniel will weigh anywhere between 14 to 20 kilograms and will probably be between 12 to 16 inches if you measure them to the shoulder. 

Females tend to be a little smaller than males though and a working Cocker Spaniel will probably be smaller and more compact in size than the show Cockers. 

What Age is a Cocker Spaniel Fully Grown?

Most Cocker Spaniels will be fully grown between the months of 12 and 18. 

You will probably see your puppy growing very quickly because dogs have a natural and genetic trait that makes them grow and become fully grown very quickly. 

Domestic dogs tend to grow at a slower rate which is why they become fully grown when they are around 18 months rather than 12.

Smaller breeds will also become fully grown quicker than larger breeds. 

Are English Cocker Spaniels Bigger than American Cocker Spaniels?

There are two major breeds of Cocker Spaniels, the English Cocker, and the American Cocker. 

There are visible differences between the two dog breeds, and you probably know which one you have depending on the breeder you bought the puppy from. 

If you aren’t sure, you can always contact the breeder or the place you got the dog. 

The English Cocker is usually larger than the American Cocker. 

However, working English Cockers can be smaller than the American Cocker. 

Working spaniels always tend to be smaller than the show-bred dogs, so it’s worth it asking the breeder what kind of dog you are buying to make sure you know what size they will be when they are fully grown. 

How Big Does the Working English Cocker Spaniel Get?

Working English Cocker Spaniels come in a variety of different sizes.

Your dog might be smaller or bigger than another one you see while walking. 

You might have a different size Cocker than other people you know who own them. 

However, a healthy working English Cocker will probably weigh between 14 to 20 kilograms. 

They are also broad-headed and powerful in appearance compared to other Cocker Spaniels. They also tend to be slim and have fine features. 

Are Working Cocker Spaniels Bigger Than Show Cockers?

Show cockers are bred for appearance so they are usually larger than working dogs. 

A breeder will always tell you which one you are getting, and you can choose a breeder based on how big you want your dog to be. 

A breeder will also be able to explain to you the differences so you can choose which one you want to get based on the size and characteristics. 

Show Cockers are usually taller and have more exaggerated features including long ears, long snouts, and long hair. 

Working Spaniels will be more compact and smaller. 

However, even though they are smaller, they will be more powerful and often more muscular. 

Are Cocker Spaniels Considered a Small or Medium Dog?

All types of Cocker Spaniels are considered to be medium size dogs. 

They make a great family dog due to their medium size because they can be walked by teenagers or smaller children if you train the dog to not pull or run ahead. 

They are also friendly and intelligent. They are also very easy to train and adaptable, so they can learn your family habits. 

Routines and proper training are also great for Cocker Spaniels because they can learn quickly and they are better behaved when they follow schedules. 

How Can I Make Sure My Dog Grows Well?

With any new puppy, you are probably concerned if they don’t seem to be growing the way you think they should. 

Remember that all dogs are different and yours might grow slower or quicker than other dogs you see, so try not to compare your dog to others dogs. 

Even from the same breed, the rate at which dogs can grow will vary. 

If you have any concerns about the way the dog is growing, you can always take the dog to the vet for a checkup.

They can weigh the dog and measure the height. 

They will compare it to the age of the dog and see if everything is normal. 

If the rate of growth seems to be slower than it should be, the vet might run some tests or do some scans to see if they can identify a problem. 

They might also advise you to put the dog on a different diet. 

Diet is important for growing puppies because they need enough nutrition to support their bones and organs. 

If you have been using cheap food or not feeding them regularly, you might want to consider switching to a better food. 

If you aren’t sure how much you should be feeding the dog for optimal growth, ask your vet. They can recommend for you the proper dose. 

Your dog also needs plenty of water and exercise to make sure it can grow. 

Without water and exercise, your dog might grow fat and have health issues later in life because the extra weight will cause strain on their joints and bones. 

Your vet might also call the breeder to verify the age of the dog if it seems to be growing slowly. 

You might think your dog is older than they are which can cause you to think they might be bigger than they should be.

Make sure to keep track of your dog’s birthday and all their medical records so you can show the vet. 

At What Age Does a Cocker Spaniel Calm Down?

Along with wondering when your dog might be fully grown, you also probably want to know when they will calm down. 

If you have a puppy that is high energy, you might be wondering when you expect them to be calmer and not as excited. 

If you are looking for a dog breed that becomes calm and docile, you might want to stay away from Cocker Spaniels. 

They are always lively and don’t ever really fully calm down. 

You might find that your Cocker Spaniel always has the energy of a puppy and even when they are old and fully grown, they will still be high energy and very excited. 

You can still train your dog to have calmer behaviors though, such as not jumping on people and not barking too much when someone comes to the door.

It’s recommended that you start training them these habits when they are younger because puppies tend to learn quicker and be more adaptable. 

How Long Do Cocker Spaniels Live?

If you take proper care of your dog, it will live about 12 to 15 years. 

You will need to make sure they are getting regular vet checkups and that they are eating well and getting plenty of exercise. 

Health issues can expect their lifespan, so you will need to make sure they are getting regular checkups to ensure all health issues are addressed in a timely manner. 

Your vet will be able to help you with treatments and antibiotics if needed. 

Final Thoughts

Your Cocker Spaniel will be fully grown around the age of 18 months. 

Some dogs might be fully grown around 12 months if they live outside as their genetics and instinct will cause them to grow and mature quicker. 

To get an idea of how big your dog might get, you can take them to the vet, and they can weigh him or her and do some other measurements. 

Most Cocker Spaniels will be about 14 to 20 kilograms though and between 12 to 16 inches. 

If you’re worried about your dog growing too slow, you can always take them to the vet and ask for advice.

Your doctor might check to see that they don’t have any health issues and do some other routine exams. 

All dogs grow at different rates, so don’t be surprised if your dog is growing faster or slower than other dogs from the same breed.