Dogster is reader-supported. When you buy via links on our site, we may earn a commission at no cost to you. Learn more.

Dog Breeds

Blue Merle Sheltie Dog Breed: Info, Pictures, Origin & History

Rachel Giordano
By Rachel GiordanoUpdated on June 17, 2026
Share
Beautiful blue merle sheltie shetland sheepdog dog fwith fluffy fur tri-color sitting on a green grass in park

The Blue Merle Sheltie, also known as the Shetland Sheepdog, is an exceptional herding breed. These intelligent and medium-sized dogs make loyal companions and prove their worth as hard-working herders. They are eager to please, affectionate, adaptable, and easy to train; however, they are sensitive to harsh commands and require delicate training. Their unique color is special and slightly uncommon, which makes them a sought-after color variation of the breed.

Read on to discover more about the remarkable Blue Merle Shetland Sheepdog.

Height:13–16 inches
Weight:15–25 pounds
Lifespan:12–14 years
Colors:Bi-colored or tri-colored black, white, and tan patterns: blue merle white and tan, blue merle and white
Suitable for:Active families, people with farms, first-time owners, small children, multi-pet households
Temperament:Loyal, intelligent, energetic, easy to train, playful, bright, affectionate, devoted, adaptable, sensitive

Blue Merle is a particular color variation of this breed, which results from a gene mutation that gives them their unique look through dilution of the black pigment. The dilution dulls patches of black into shades of gray, resulting in a beautiful yet unusual appearance of black, tan, and white, speckled throughout a blue color.

The color variation does not influence different characteristics, as they are just as energetic and affectionate as other color variations within the breed.

Blue Merle Shetland Sheepdog Breed Characteristics

Energy
+
Trainability
+
Health
+
Lifespan
+
Sociability
+
divider single dog paw oct 2024

The Earliest Records of the Blue Merle Shetland Sheepdog in History

The Shetland Sheepdog, more commonly referred to as the Sheltie, hails from the Shetland Islands, which is located within the northernmost point of the United Kingdom. These dogs, often mistaken as “miniature Collies,” share the same ancestry as their Collie cousins but are their own breed. They were bred to be smaller than Collies due to scarce food in the harsh and cold climate of the Shetland Islands—smaller dogs do not have as much of an appetite compared to larger herding dogs, and the smaller size was on purpose.

Unfortunately, the exact breeding history of these dogs has been lost due to the lack of documentation of the island’s native farmers, but we do know that during the 20th century, Shelties were brought to the Scottish mainland and bred down to a more suitable size to compensate for the scarce rations in the Shetland Islands. Interestingly, these dogs were mostly unheard of due to the island’s isolation; people did not know of the breed until the breed was brought to the Scottish mainland.

Image by: arturs.stiebrins, Shutterstock

How the Blue Merle Shetland Sheepdog Gained Popularity

When the Shetland Sheepdog made its way to Scotland and England during the 20th century, they continued to serve as herding dogs and were a favorite among farmers for their ability to herd in the rough terrain of the Shetland Islands. However, their bright personalities and small size made the public realize that these dogs can also serve as loyal and affectionate companions while still serving their original purpose, which was herding sheep, ponies, and poultry.

Regarding the Blue Merle, their appearance is strikingly beautiful, which makes them even more popular pets to own given their playful and energetic characteristics; they also excel at canine sports, such as agility, rally, and obedience events, which made them even more appealing to potential dog owners. Even though this breed continues to work as herding dogs, they still make excellent companions, as well as therapy dogs, and are still popular canines to own.

Formal Recognition of the Blue Merle Shetland Sheepdog

The Shetland Sheepdog was first recognized by the Kennel Club of England in 1909, and just a couple of years later, in 1911, the American Kennel Club (AKC) formally recognized the breed. The American Shetland Sheepdog Association (ASSA) is the AKC parent club of the breed and was formed in 1929. This club’s purpose is to preserve the integrity and interests of the breed through education, rescue, research, and responsible breeding. Today, the club has over 767 members and over 66 member breed clubs scattered throughout the United States.

Dogster_Website dividers_v1_Jan 18 2024-03

Top 5 Unique Facts About the Blue Merle Shetland Sheepdog

1. They Are Reserved With Strangers

This is an affectionate and devoted family dog, but they tend to be unsure and reserved with people they don’t know, so don’t be surprised if your Blue Merle Sheltie is shy and avoids strangers. However, they are not typically aggressive with strangers.

Image by: Vera Reva, Shutterstock

2. The Word Blue in the Name Is Misleading

The Blue Merle Sheltie is not actually blue. The “Blue Merle” term comes from the different shades of gray that occur from the diluted black pigment. The diluted black pigment is also what makes the irregular patches of pattern and size throughout the coat.


3. They Could Have Brown or Blue Eyes

One would think that Blue Merle Shelties all have blue eyes, but this isn't always the case. They have a genetic mutation that causes blue eyes, but they could have one blue eye and one brown eye or either of the two.

Image by: Lisjatina, Shutterstock

4. They Prefer Colder Climates

It is no wonder that the Blue Merle Shetland Sheepdog prefers cold climates, given their place of origin. The Shetland Islands have a cold, harsh climate with rugged terrain, and these dogs were bred to withstand the environment. They have a double coat, which helps keep them warm in extremely cold weather. Needless to say, they can overheat quickly in hot temperatures.


5. They Excel in Everything!

We’ve touched on their versatility but have only scratched the surface. Given their bright, playful, and intelligent temperaments, these dogs excel in canine sports and are excellent herders. They are extremely smart and love learning new tricks. In fact, they are considered the top canine competitors in the world.

Image by: arturs.stiebrins, Shutterstock
Dogster_Website dividers_v1_Jan 18 2024-01-TEST

Does the Blue Merle Shetland Sheepdog Make a Good Pet?

The Shetland Sheepdog makes an excellent pet regardless of the color variations. They are affectionate, loyal, intelligent, playful, bright, and eager to please. They are easy to train and do well with praise and treats. However, they are sensitive dogs and do not respond well to harsh tones or commands; it is best to use positive reinforcement with this breed.

Proper training is vital with this breed—without proper training, they may bark excessively and try to herd other pets in the home and humans. They require early socialization as well to keep these unwanted behaviors away.  Regular exercise is needed to keep them in shape and healthy, and you can have fun teaching your Blue Merle Sheltie agility courses, rallies, and even participating in obedience events.

These dogs are extremely bright and are happiest with a job or task to do, which makes them perfect for active families.

divider dog paws 3 oct 2024

Closing Thoughts

The Blue Merle Sheltie, or Shetland Sheepdog, is a strikingly beautiful dog with a unique appearance. Regardless of color variation, these dogs make exceptional family companions and are easy to train. They excel in almost anything they do and are considered the top canine competitors in the world.

These dogs require early socialization to prevent excessive barking, but with their intelligence, they will understand quickly how to behave appropriately. If you’re looking for a fun, playful, intelligent, and devoted companion, you can’t go wrong with a Blue Merle Sheltie.

See also:

Sources

Featured Image Credit: arturs.stiebrins, Shutterstock

Want content like this delivered to you?

News, insights, expert advice, and everything dog

Rachel Giordano
Authored by

Rachel Giordano

Blue Merle Border Collie: Info, Pictures, Origin & History

Blue Merle Border Collie: Info, Pictures, Origin & History

The Border Collie is a friendly dog that anyone would be proud to call a pet, as they're a loyal, energetic, and loving companion. However, have you ever thoug…

Patricia Dickson
By Patricia Dickson · 2 weeks ago
Shetland Sheepdog (Sheltie) Breed: Info, Pictures, Traits & More

Shetland Sheepdog (Sheltie) Breed: Info, Pictures, Traits & More

As the breed name suggests, the Shetland Sheepdog—affectionately known as the "Sheltie"—hails from Shetland. In this Scottish archipelago, this breed was first…

Kit Copson
By Kit Copson · 3 days ago
10 Surprising Sheltie (Shetland Sheepdog) Facts

10 Surprising Sheltie (Shetland Sheepdog) Facts

The Shetland Sheepdog, or “Sheltie” for short, is a herding dog from Scotland. They make great pets with their high intelligence and adorable small size. Many…

Sarah Psaradelis
By Sarah Psaradelis · 2 weeks ago
Blue Merle Australian Shepherd: Info, Pictures, Origin & History

Blue Merle Australian Shepherd: Info, Pictures, Origin & History

Australian Shepherds are a popular dog breed among people who keep livestock and people with active lifestyles. Sometimes, they are confused with Border Collie…

Brooke Billingsley
By Brooke Billingsley · 2 weeks ago
June 17, 2026

Blue Merle Corgi: Info, Pictures, Origin & History

If you’re looking for a Corgi, few color variations are quite as cute as the merle blue. It is an adorable pattern on an adorable dog, which is why we wanted t…

Nicole Cosgrove
By Nicole Cosgrove
Blue Merle Corgi: Info, Pictures, Origin & History
June 29, 2026

Shetland Sheepdog vs Australian Shepherd: The Differences (With Pictures)

The Shetland Sheepdog is nicknamed the Sheltie and is a herder from the Shetland Islands of Scotland. They used to stand guard for the farmers and prevent bird…

Nicole Cosgrove
By Nicole Cosgrove
Shetland Sheepdog vs Australian Shepherd: The Differences (With Pictures)
June 29, 2026

Sheltie vs Border Collie: Key Differences (With Pictures)

Shelties (officially known as Shetland Sheepdogs) and Border Collies have much in common, not just their herding heritage. It’s incredibly easy to confuse thes…

Lorre Luther
By Lorre Luther
Sheltie vs Border Collie: Key Differences (With Pictures)
June 29, 2026

Male vs Female Shetland Sheepdogs (Shelties): The Differences & Pictures

Shelties were bred as herding dogs on the Shetland Islands of Scotland, hence the name Shetland Sheepdog. They're also known as the Shetland Collie, but their…

Kristin Hitchcock
By Kristin Hitchcock
Male vs Female Shetland Sheepdogs (Shelties): The Differences & Pictures
June 29, 2026

Border Collie Shetland Sheepdog: Info, Pictures, Care Guide & More

The Border Collie Shetland Sheepdog, also known as the Border Sheepdog, is a hybrid breed resulting from pairing a Border Collie with a Shetland Sheepdog. Thes…

Chantelle Fowler
By Chantelle Fowler
Border Collie Shetland Sheepdog: Info, Pictures, Care Guide & More
June 17, 2026

10 Dog Breeds With Blue Eyes: Info, Pictures & History

All dogs are beautiful in different ways, but a pair of sparkling blue eyes can add a distinctive magnetism to put their looks over the top. The coloration som…

Nicole Cosgrove
By Nicole Cosgrove
10 Dog Breeds With Blue Eyes: Info, Pictures & History
June 17, 2026

Blue German Shepherd Dog Breed: Info, Pictures, History & More

German Shepherds have been a long-standing favorite among dog lovers for years! It’s really no wonder. They have proven to be extremely useful for service-rela…

Ashley Bates
By Ashley Bates
Blue German Shepherd Dog Breed: Info, Pictures, History & More
June 29, 2026

Sheltidoodle Dog Breed: Info, Pictures, Care & Traits

A Sheltidoodle is a mixed breed that is a cross between a Shetland Sheepdog and a Poodle. They are highly intelligent due to their Poodle parent and active due…

Nicole Cosgrove
By Nicole Cosgrove
Sheltidoodle Dog Breed: Info, Pictures, Care & Traits

Love Dogs? So Do We! Join the Dogster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.

You may opt-out at any time. View our Privacy Policy for more information.

The Dogster app on a phone