K
Species Profile

Kerry Blue Terrier

Canis lupus familiaris

Born black, turns blue, works hard
Osetrik/Shutterstock.com

Kerry Blue Terrier Distribution

Click a location to explore more animals from that region

Origin Location

This map shows the native origin of the Kerry Blue Terrier. As a domesticated species, they are now found worldwide.

Loading map...

Found in 1 country

🇮🇪 Ireland

Size Comparison

Human 5'8"
Kerry Blue Terrier 1 ft 6 in

Kerry Blue Terrier stands at 27% of average human height.

Happy kerry blue terrier playing outdoors.

At a Glance

Domesticated
Also Known As Kerry Blue, Kerry, The Kerry, Irish Blue Terrier
Diet Omnivore
Activity Diurnal+
Lifespan 4 years
Weight 20 lbs
Status Not Evaluated
Did You Know?

Kerry Blue puppies are born black; the coat usually "clears" to blue-gray over months to years (often not fully set until ~18-24 months).

Scientific Classification

The Kerry Blue Terrier is an Irish terrier breed developed as a versatile farm and working dog; it is best known for its characteristic blue-gray coat that typically lightens as the dog matures.

Kingdom
Animalia
Phylum
Chordata
Class
Mammalia
Order
Carnivora
Family
Canidae
Genus
Canis
Species
Canis lupus

Distinguishing Features

  • Coat color develops from dark (often black at birth) to blue-gray as the dog matures
  • Curly/wavy, dense single coat often groomed/trimmed in a distinctive terrier outline
  • Terrier build: compact, muscular, agile
  • Traditionally a multipurpose working terrier (vermin control, herding, guarding)

Physical Measurements

Males and females differ in size

Height
♂ 1 ft 7 in (1 ft 6 in – 1 ft 7 in)
♀ 1 ft 6 in (1 ft 5 in – 1 ft 6 in)
Length
♂ 2 ft 4 in (2 ft 1 in – 2 ft 7 in)
Weight
♂ 36 lbs (33 lbs – 40 lbs)
♀ 32 lbs (29 lbs – 35 lbs)
Tail Length
♂ 9 in (9 in – 10 in)
Top Speed
28 mph
Fast, energetic runner

Appearance

Primary Colors
Blue Gray
Secondary Colors
Black Silver White
Skin Type Canine skin beneath a dense, soft, wavy-to-curly single coat (minimal undercoat). Skin is typically moderately sensitive; coat structure traps debris and moisture if not groomed/dried properly.
Distinctive Features
  • Kerry Blue Terrier (Canis lupus familiaris) is a domestic dog breed, not a wild species; has a non-shedding, wavy or curly single coat and blue-gray color that appears with age.
  • Coat: soft, dense, wavy to curly, usually trimmed/scissored into a terrier outline; low-shedding but high-maintenance (prone to matting without regular brushing and professional grooming).
  • Color development: puppies commonly start black/dark and progressively lighten to blue-gray as they mature (a hallmark trait distinguishing the breed).
  • Head/outline: strong terrier head with a pronounced beard/mustache and leg furnishings when left longer; compact, athletic, square-built working-dog silhouette.
  • Temperament/roles: bold, confident Irish terrier developed for versatile farm work (vermin control, guarding, herding assistance, general utility); typically alert and energetic with a strong prey drive and need for structured training and socialization.
  • Brush and comb several times a week to prevent mats; trim hair every 4 to 8 weeks; clean ears and remove ear hair; give daily exercise and mental games to prevent boredom and bad behavior.
  • Kerry Blue Terriers can have skin problems (dermatitis), cysts or lumps, ear infections from hair and poor airflow, hip dysplasia, and eye issues like cataracts. Owners manage with health tests, weight care, grooming, ear cleaning.

Sexual Dimorphism

Moderate sexual dimorphism typical of domestic dogs: males are usually larger and more robust; females tend to be slightly smaller and finer-boned. Coat color/texture is not strongly sex-linked.

♂
  • Typically taller/heavier with a broader skull and more pronounced muscle mass through neck and shoulders.
  • Often a squarer, more powerful overall outline.
♀
  • Typically slightly smaller with a more refined head and lighter bone structure.
  • Often a marginally more streamlined build while retaining the breed's athletic proportions.

Did You Know?

Kerry Blue puppies are born black; the coat usually "clears" to blue-gray over months to years (often not fully set until ~18-24 months).

Unlike many double-coated breeds, the Kerry typically has a soft, wavy-to-curly single coat that sheds relatively little but needs regular clipping.

Historically in Ireland it was an all-purpose farm dog-ratting, herding, guarding, and even retrieving from water.

The breed is strongly associated with County Kerry and became a recognizable symbol of Irish dog-breeding tradition.

Kerry Blues were among early Irish dogs promoted in the show world, helping put Irish native breeds on the international map.

Their hallmark head furnishings-beard and eyebrows-are shaped by grooming and are part of the classic breed silhouette.

Terrier tenacity is real: many Kerry Blues retain strong prey drive and can be intense with unfamiliar dogs without early socialization.

Unique Adaptations

  • Selected-from-wolf toolkit (Canis lupus lineage): keen scenting, stamina, and social bonding were redirected by breeding into a cooperative, human-focused working terrier.
  • Coat "clearing" genetics: the distinctive progressive lightening from black puppy coat to blue-gray adult coat is a breed hallmark.
  • Single, wavy/curly coat provides weather buffering with low shedding-useful for an outdoor farm dog in damp climates, but it mats without grooming.
  • Compact, athletic build: balanced strength and agility suited to switching jobs (ratting, herding, guarding) rather than specializing in one task.
  • Strong jaws and tenacious grip reflect terrier function-effective for dispatching vermin but requiring thoughtful play and bite-inhibition training.
  • Expressive facial furnishings (beard/eyebrows) enhance the breed's recognizable "Kerry" look; grooming preserves function by keeping hair out of eyes and mouth.

Interesting Behaviors

  • "Terrier scan": alert head-up watching, then a sudden burst of speed toward moving objects-classic vermin-hunter behavior.
  • Beard-first investigation: many Kerry Blues lead with their muzzle and facial furnishings, sniffing and "bumping" objects or hands.
  • Play can look like work-shaking toys vigorously mimics dispatching rats and other quarry.
  • Protective home-body tendencies: often reserved with strangers but deeply attached to family, with quick alarm barking.
  • High engagement learning: many thrive on interactive training (tug rewards, tracking games), but may test limits if rules are inconsistent.
  • Dog-selective moments: some individuals show same-sex or general dog intolerance unless carefully socialized and managed.
  • Natural "job seeking": if under-stimulated, they may invent tasks like patrolling fences, digging, or reorganizing laundry.

Cultural Significance

The Kerry Blue Terrier (Canis lupus familiaris) is an Irish native breed, once a useful farm and working dog and later a show dog. Its blue coat and bold terrier character made it a symbol of County Kerry and Irish dog culture.

Myths & Legends

A widely repeated origin tale says a blue-coated dog survived a shipwreck off Ireland's southwest coast and was bred into local terriers, explaining the Kerry's unusual color.

Another traditional story links the breed's blue to imported dogs from Spain or Russia brought by sailors and traders, later crossed with Irish farm terriers.

Irish stories about the Kerry Blue Terrier (Canis lupus familiaris) say these blue terriers did everything on farms: killed barn rats, guarded yards, and herded animals, making an all-purpose origin story.

Early 20th-century Irish breed lore cast the Kerry Blue as a patriotic native dog-an emblem of Irish identity in the same cultural moment that revived other Irish traditions (music, language, sports).

Conservation Status

NE Not Evaluated

Has not yet been evaluated against the criteria.

Population Stable

Life Cycle

Birth 4 pups
Lifespan 4 years

Lifespan

In the Wild
2–7 years
In Captivity
10–16 years

Reproduction

Mating System Polygynandry
Social Structure Managed Domestic
Breeding Pattern Serial
Fertilization Managed Selective
Birth Type Managed_selective

Kerry Blue Terrier (Canis lupus familiaris) breeding is human-directed: breeders pick mates for pedigree, looks, temperament, and health, with timed matings and vet help. Dogs mate internally and often have different partners across seasons, not lifelong bonds.

Behavior & Ecology

Social Pack Group: 3
Activity Diurnal, Crepuscular
Diet Omnivore High-protein meat-based foods (e.g., beef or chicken; many individuals are especially motivated by meat treats).

Temperament

Kerry Blue Terriers are more terrier-like: stronger prey and chase drive, more likely to challenge, more independent in problem solving, play harder, and are choosier about dog friends than many pet breeds.
Confident, alert, and people-attached; typically affectionate with family but reserved with strangers until properly introduced (watchdog tendency).
High working drive; benefits from daily purposeful activity (training games, scent work, retrieving, agility). Under-stimulation can present as restlessness, demand barking, digging, or rough play.
Dog-dog dynamics: can be assertive and may show same-sex intolerance; best outcomes with early, ongoing socialization and management around unfamiliar dogs.
Prey drive: may pursue small animals; reliable recall often requires extensive training and controlled exposure.
Trainability: intelligent and responsive but can be stubborn; performs best with short, varied sessions, clear boundaries, and reward-based methods (harsh corrections can increase defensiveness).
Care requirements (behavior-linked): requires regular exercise plus mental enrichment; needs consistent grooming/handling habituation (coat, ears, nails) to prevent avoidance and irritability during care.
Kerry Blue Terriers may have skin and ear problems, hip dysplasia, eye disease (cataracts/PRA), and hypothyroidism. Pain or illness can make them less social, jumpy, or tired; regular checks help.

Communication

Sharp alert barking Stranger approach, novel sounds
Low growl or rumble during boundary-setting or discomfort
Whining/whimpering for attention, anticipation, or mild stress
Play barks during high arousal games
Terrier-typical posture: forward stance, direct stare, and stiff tail carriage to signal confidence or challenge
Play bows and pawing to initiate interaction; mouthing during play if not redirected early
Scent investigation and urine marking (more common in intact males) to map territory
Physical contact seeking (leaning, following, proximity) as bonding behavior with family/primary handler
Facial expressions and ear/tail set changes that escalate quickly if over-threshold-important to read early signals during dog-dog introductions

Habitat

Suburban Urban Agricultural/Farmland Woodland Grassland Deciduous Forest Steppe Prairie Desert Alpine Meadow Wetland River/Stream Coastal +7
Biomes:
Temperate Forest Temperate Grassland Mediterranean Boreal Forest (Taiga) Tundra Alpine Desert Hot Desert Cold Savanna Tropical Dry Forest Tropical Rainforest Wetland Freshwater Marine +8
Terrain:
Plains Hilly Coastal Valley Riverine Island
Elevation: Up to 16404 ft 3 in

Ecological Role

Human-associated mesopredator/commensal; in the Kerry Blue Terrier's working context, a targeted vermin-control and farm guardian companion rather than a wild ecosystem forager.

Rodent and pest suppression in farm/yard settings (historical role) Deterrence of some nuisance wildlife via presence and patrol behavior Companion animal role supporting human activities (working, sport, and household)

Diet Details

Main Prey:
Rats and other rodents Rabbit Small birds and ground-nesting birds Invertebrates Animal-based foods
Other Foods:
Berries and other fruits Vegetables Grains and starches Plant matter

Human Interaction

Domestication Status

Domesticated

Canis lupus familiaris: domesticated dog from the gray wolf. Kerry Blue Terrier, from County Kerry, Ireland, is a tough farm and working terrier for vermin control, guarding, herding help, and sometimes hunting or retrieving. It has a blue-gray coat (born black, lightens), soft low-shed hair needing shaping. Needs lots of training, grooming, and human interaction.

Danger Level

Low
  • Bite risk exists like all dogs, often linked to inadequate socialization, fear, pain, resource guarding, or rough handling-terrier assertiveness can increase likelihood of snapping if boundaries are ignored.
  • May be dog-selective or reactive if not carefully socialized; conflicts between dogs can lead to redirected bites to handlers trying to separate fights.
  • High prey drive can cause chasing behavior; risk is primarily to small animals but can lead to knock-down injuries to children/elderly if the dog lunges or plays roughly.

As a Pet

Suitable as Pet

Legality: Kerry Blue Terrier (Canis lupus familiaris) is usually legal to own in the U.S. It follows normal dog rules (license, leash) and sometimes local limits that target certain dog types. Check city, HOA, or breed laws.

Care Level: Experienced

Purchase Cost: Up to $3,500
Lifetime Cost: $20,000 - $50,000

Economic Value

Uses:
Companion animal Working/utility dog (historical farm use) Sport/performance dog Show dog (grooming and conformation) Service sector spending (veterinary, grooming, training, boarding)
Products:
  • Breeding and sale of puppies (reputable breeders, rescues/adoption)
  • Professional grooming (hand-scissoring/clipping, bathing, coat maintenance)
  • Training services (basic manners, behavior consults, sport training)
  • Veterinary care (preventive care; management of breed-associated conditions)
  • Equipment (crates, leashes, enrichment toys, sport gear)

Relationships

Predators 5

Gray wolf
Gray wolf Canis lupus
Coyote
Coyote Canis latrans
Cougar
Cougar Puma concolor
Bobcat
Bobcat Lynx rufus
Brown bear
Brown bear Ursus arctos

Related Species 8

Gray wolf
Gray wolf Canis lupus Shared Genus
Coyote
Coyote Canis latrans Shared Genus
Golden jackal
Golden jackal Canis aureus Shared Genus
Ethiopian wolf Canis simensis Shared Genus
Dingo
Dingo Canis lupus dingo Shared Genus
Red fox
Red fox Vulpes vulpes Shared Family
Fennec fox
Fennec fox Vulpes zerda Shared Family
African wild dog
African wild dog Lycaon pictus Shared Family

Ecological Equivalents 7

Animals that fill a similar ecological role in their ecosystem

Soft Coated Wheaten Terrier Canis lupus familiaris Shares an Irish farm-dog background. A versatile, all-around working companion, but typically less combative and less inclined to guard than many terriers.
Irish Terrier
Irish Terrier Canis lupus familiaris Shares the terrier vermin-control and farm-guardian niche. Generally leaner, with a more fiery temperament and a harsher red coat.
Airedale Terrier
Airedale Terrier Canis lupus familiaris Comparable all-purpose working terrier niche (farm work, guarding, vermin control, and occasional water work); larger size and often a stronger prey drive.
Border Collie
Border Collie Canis lupus familiaris Commonly used on farms as a versatile working dog, overlapping in stamina and trainability demands but specializing in herding rather than vermin control.
Red fox
Red fox Vulpes vulpes Occupies a small- to medium-sized predator niche around farms and field edges, with a similar prey base (rodents and rabbits), but is a wild mesocarnivore rather than a human-directed working animal.
Feral cat Felis catus Overlaps strongly in the barn/yard rodent-control role. Targets comparably sized prey but uses stealth and ambush versus a terrier's pursuit-and-grab style.
Stoat
Stoat Mustela erminea Small-mammal specialist predator in rural landscapes. Serves as an ecological analogue for vermin suppression, though it is much smaller and entirely wild.

Quick Take

  • Securing a show-winning specimen requires an investment reaching $1,600 before the blue coat transition begins.
  • The 4 to 6-week grooming requirement creates a persistent maintenance challenge for unprepared owners.
  • Surprisingly, the Kerry Blue proved its versatility as a herding dog despite traditional terrier limitations.
  • Monitoring the black-to-blue color transition is necessary to verify the purity of pedigree puppies.

Kerry Blues are a breed of terrier that is known for their blue-toned coats. They are working dogs bred to hunt rodents and herd sheep. Kerry Blue terriers are loving, loyal, and intelligent dogs. They are protective and make great family dogs. Because they are hypoallergenic, they are suitable for people with allergies to dogs.

A detailed infographic about the Kerry Blue Terrier featuring a photo of a mature dog, icons for grooming and health, and charts for size, weight, and temperament.
From Irish battlefields to high-stakes dog shows, discover the breed that starts life pitch black but hides a stunning blue future. © A-Z Animals

3 Pros and Cons of Owning Kerry Blue Terriers

ProsCons
They have a high energy level. These dogs are ready to exercise whenever you are. Their energetic temperaments make them great running and hiking companions, and they will appreciate a large yard to run around in.They can be very rowdy when young. This is a high-energy breed, especially early in their lifespan. They need to be exercised daily to keep their temperaments in check.
They have a beautiful coat. Soft, wavy, and hypoallergenic, these dogs are prized for their coats. If properly bred, puppies will be born black and then gray as they age to the famous blue coat color. Shedding is not a concern, though they do require regular grooming to keep their coat neat.Not friendly to other animals. Because they were bred as hunting dogs, it is not safe to keep smaller pets like cats and rabbits around when choosing to rescue a Kerry Blue terrier. They can be trained to be social with other dogs, but their hunting instincts mean befriending other animals is much more difficult.
They make great watchdogs. Having been used as police dogs in Ireland, Kerries are very loyal dogs that aim to protect their families. They are strong-willed and brave because of their hunting instincts, so this makes them a good choice as watchdogs.They are high maintenance. This breed requires regular grooming. They should be taken to a groomer every 4 to 6 weeks, where their coat can be washed and trimmed. Owners can learn to shape and trim the dogs’ coats themselves.

History of the Breed

The Kerry Blue Terrier, as its name suggests, is a breed of dog that originated from County Kerry in Ireland. Despite the charming Blarney tales surrounding its beginnings, much remains unknown about the actual history of this beloved breed. However, one thing that is certain is that Kerries were highly valued for their versatility and hardworking nature on farms.

During the fight for Irish independence in the early 20th century, Kerries were considered to be symbols of patriotism and played an important role in raising morale among Irish citizens. Since then, they have become popular show dogs and have achieved notable wins in various competitions around the world.

One notable example is Mick, a Kerry Blue Terrier who was a great show dog during the 2000s. This impressive achievement speaks volumes about both their innate ability to perform well under pressure and also their enduring popularity as pets and companions.

Despite being relatively small compared to other breeds such as Great Danes or Mastiffs, Kerry Blues are known for their resilience and determination — traits that no doubt helped them thrive on farms before becoming cherished family pets. Overall, it’s clear why these lovable dogs continue to capture hearts everywhere with their unique blend of charm and hard-working spirit!

Size and Weight

Kerry Blue Terrier in a spring garden

Kerry Blue terriers are medium-sized dogs with soft and wavy coats.

©CaptureLight/Shutterstock.com

Kerry Blue terriers are medium-sized dogs with soft and wavy coats. Breeders aim to produce dogs with a black coat that eventually grays over time, giving them their signature “blue” color. Female Kerry Blue terriers are typically smaller than their male counterparts.

Male Height18.5 to 20 inches
Female Height17.5 to 19 inches
Male Weight33 to 40 pounds
Female Weight33 to 40 pounds

Common Health Issues

Kerry Blue Terrier lying down on grass

Kerry blue terriers are prone to dysplasia of the hips and elbows.

©Pashin Georgiy/Shutterstock.com

Kerry Blue terriers tend to be fairly healthy dogs, with good breeders dedicated to breeding healthy dogs. However, Kerries may develop serious health issues as they age. These include things like hip and elbow dysplasia, which is a painful condition that affects movement. They are also susceptible to cataracts and dry eyes, affecting their vision as they age. Finally, some Kerry Blues develop cysts or tumors that are very occasionally malignant and require cancer treatment.

Temperament

Kerry blue Terrier on snow in winter

Kerry blue terriers are fun to train.

©golubka57/Shutterstock.com

Kerry Blues are loyal and affectionate. They are also very strong-willed, so they will need an owner who can enforce their training. Puppy classes, when the terriers are young, will provide a solid training foundation for the rest of their lifespan, so they are recommended.

They are good-natured in their interactions with people of all ages, but can be aggressive toward other dogs if they have not been properly trained. These Irish terriers were originally bred to be hunting dogs, so it is not advised to rescue a Kerry Blue if there are also small animals in the household.

The Best Dog Food for Kerry Blue Terriers

Kerry Blue Terrier in wild mountain ambient

Kerry blue terriers are active dogs that require well-balanced diets and plenty of exercise.

©Simone Capozzi/Shutterstock.com

Kerry Blue terriers are highly active dogs, so their diet must reflect this. Most high-quality dog foods, as recommended by a veterinarian, will suffice for the Kerry Blue terrier.

Puppy Kerry Blue terrier food: Good animal-based fat, such as chicken, omega-3, or fish, should be included in their food, as it promotes healthy development. Treats can be used for obedience training, but be careful not to overfeed them, as these dogs can be prone to obesity.

Adult Kerry Blue terrier food: It is recommended that Kerry Blue terriers be fed 1.5-2 cups of high-quality dry food throughout the day.

Maintenance And Grooming

Kerry Blue terriers are hypoallergenic dogs without much shedding. However, they do require regular grooming and are considered high maintenance. They need to be brushed daily and shampooed every 4 to 6 weeks. Their coat will need to be trimmed monthly.

Training

Training is essential when it comes to Kerry Blue Terriers. They are very protective and should be socialized around other dogs early on as a part of their training. They are natural problem solvers and can become independent very quickly. Kerry Blue terriers respond best to motivational, positive reinforcement. They will need consistent rules during their training.

Exercise

They are sporty dogs who enjoy long walks or jogs. They will need a good amount of exercise each day and would benefit from a trip to the park to play with other dogs. Kerry Blue terriers make excellent companions on a jog or hike. They also enjoy swimming, hunting, and other outdoor activities. They enjoy intelligent play, so any problem-solving play exercises that they can do with their owners will be beneficial for them.

Puppies

a pair of Kerry blue Terriers

Kerry blue terriers cost more than a thousand dollars for a puppy.

©Evgeniia Shikhaleeva/Shutterstock.com

Kerry Blue terriers have 4 to 8 puppies in a litter. They are purebred dogs, with a price typically ranging from $1,000 to $3,500, depending on the breeder and lineage. This price is quite high because of how specialized this breed is. They should be trained early on as puppies to ensure good habits.

Breeders will produce black Kerry Blue terrier puppies, and these dogs will grow into their famous blue coats as they age.

With Children

With proper training, Kerry Blues are great around children. They are very affectionate and intelligent dogs, making them a perfect fit for a family. Because they are affectionate and playful, they can keep children entertained for hours.

Similar Dogs

  • Airedale Terrier: This breed was also bred to hunt and has a similar size and silhouette to the Kerry Blue Terrier. They are also not prone to shedding.
  • Giant Schnauzer: Though larger than Kerry Blue terriers, these dogs are also hypoallergenic and make great guard dogs. However, they are larger and slightly more aggressive.
  • Irish Wolfhound: While the peasantry bred Kerry Blue terriers to hunt in nobles’ hunting grounds, the royals bred Irish Wolfhounds to protect those grounds. Because of this dichotomy, the two breeds share many similar temperaments and personality traits.

Famous Kerry Blue Terriers

The Irish nationalist leader Michael Collins owned a Kerry Blue terrier named Convict 224. It was Collins who attempted to have the Kerry Blue Terrier named the national dog of Ireland.

A Kerry Blue terrier was the first dog registered in the Irish Kennel Club.

View all 103 animals that start with K

Sources

  1. Dog Time / Accessed March 24, 2021
  2. American Kennel Club / Accessed March 24, 2021
  3. Dog Breeds List / Accessed March 24, 2021
  4. K9 Web / Accessed March 24, 2021
  5. Dog Food Guru / Accessed March 24, 2021
  6. Petful / Accessed March 24, 2021
  7. Your Pure Bred Puppy / Accessed March 24, 2021
Heather Hall

About the Author

Heather Hall

Heather Hall is a writer at A-Z Animals, where her primary focus is on plants and animals. Heather has been writing and editing since 2012 and holds a Bachelor of Science in Horticulture. As a resident of the Pacific Northwest, Heather enjoys hiking, gardening, and trail running through the mountains with her dogs.

Thank you for reading! Have some feedback for us?

Related Articles You May Find Interesting

Kerry Blue Terrier FAQs (Frequently Asked Questions)

The initial cost is $1,000 to $3,500. Subsequent costs will vary depending on the individual dog. Some additional costs for Kerry Blues include grooming sessions and high-quality food. These costs may add up throughout the dog’s lifespan.

View Kerry Blue Terrier Photos