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Species Profile

Irish Terrier

Canis lupus familiaris

Red coat. Big courage.
otsphoto/Shutterstock.com

Irish Terrier Distribution

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Origin Location

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

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Found in 1 country

Size Comparison

Human 5'8"
Irish Terrier 1 ft 7 in

Irish Terrier stands at 27% of average human height.

beautiful irish terrier dog portrait outdoors

At a Glance

Domesticated
Also Known As Irish Red, Red Terrier
Diet Omnivore
Activity Diurnal+
Lifespan 14 years
Weight 13 lbs
Status Not Evaluated
Did You Know?

Nicknamed the "Daredevil" for its famously fearless terrier temperament.

Scientific Classification

The Irish Terrier is a medium-sized terrier breed of domestic dog, historically developed in Ireland as a versatile working terrier (farm and household roles) and now primarily kept as a companion and sport dog.

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

Distinguishing Features

  • Medium-sized, athletic terrier build
  • Typically harsh, wiry red/wheaten coat with a characteristic terrier facial furnishings (beard/eyebrows)
  • V-shaped drop ears
  • Alert, confident terrier temperament and posture

Physical Measurements

Males and females differ in size

Height
1 ft 6 in (1 ft 6 in – 1 ft 7 in)
1 ft 6 in (1 ft 5 in – 1 ft 6 in)
Length
2 ft 6 in (2 ft 3 in – 2 ft 8 in)
Weight
28 lbs (24 lbs – 31 lbs)
25 lbs (22 lbs – 26 lbs)
Tail Length
10 in (9 in – 12 in)
Top Speed
28 mph
Fast and agile

Appearance

Primary Colors
Secondary Colors
Skin Type Skin under a harsh, wiry double coat: a dense undercoat and rough outer coat that protect from weather and brambles. Low shedding if groomed with regular stripping by hand, not frequent clipping.
Distinctive Features
  • Medium-sized, athletic terrier outline with a deep chest and strong, straight forelegs; built for agile farm/yard work rather than the more generalized build seen across the base species.
  • Harsh, wiry, close-lying coat with minimal feathering; hallmark of the breed's working-terrier heritage and a key visual distinction from many smoother or longer-coated domestic dogs.
  • Distinctive facial furnishings: pronounced beard and mustache with wiry eyebrows; head appears long and rectangular with a strong muzzle.
  • Small, V-shaped drop ears set high, carried close to the head; contributes to the alert terrier expression.
  • Typically dark eyes and a black nose; overall expression keen and intense.
  • Tail set high; historically docked in some regions for working use-now varies by country/legal standards (can also be naturally carried upright).
  • Breed-specific care requirement: coat is best maintained by periodic hand-stripping (or carding) to preserve correct harsh texture and color; heavy clipping can soften/fade the coat and increase matting.
  • Watch for inherited eye disease (cataracts, PRA), skin and allergy problems in some lines, and general muscle and bone issues. Regular ear and skin checks are important; testing and careful breeding are recommended.

Sexual Dimorphism

Sexual dimorphism is present but modest: males tend to be slightly larger, heavier-boned, and more 'substantial' in head/chest; females are usually a bit finer and lighter. Coat color and type are essentially the same in both sexes.

  • Slightly greater height/weight on average; broader head and chest giving a more robust outline.
  • Often carries more overall muscle mass, especially through shoulders and neck.
  • Slightly lighter, finer bone and a more refined head; overall silhouette can look a touch more streamlined.
  • Same harsh wiry coat and facial furnishings, typically appearing a bit less massive through the forequarters.

Did You Know?

Nicknamed the "Daredevil" for its famously fearless terrier temperament.

One of the oldest terrier breeds; it was standardized in Ireland in the late 1800s.

The iconic harsh, wiry red coat is meant to shed dirt and resist weather on farms and in hedgerows.

Unlike many terriers, Irish Terriers are often described as especially devoted to their people-alert watchdogs with a big heart.

The breed's signature "furnishings" (beard/eyebrows) help protect the face while pushing through brush.

Irish Terriers served as messenger and sentry dogs in World War I, valued for courage and reliability.

Unique Adaptations

  • Harsh, wiry double coat (with softer undercoat): helps insulate and protect skin from brambles and wet Irish weather; typically maintained by hand-stripping for correct texture.
  • Lean, athletic terrier build: optimized for endurance and agility rather than bulk-useful for farm work and vermin control.
  • Facial furnishings: eyebrows and beard provide extra protection to muzzle/eyes when working in brush or confronting pests.
  • High pain tolerance and persistence (a terrier hallmark): advantageous for working roles, but can mask injury-owners should check for cuts/foxtails after hikes.
  • Compact, efficient gait: suited to covering ground at a trot for long periods, aligning with a versatile "all-purpose" farm terrier history.

Interesting Behaviors

  • High "terrier drive": quick to investigate, chase small moving objects, and dig-especially in yards or sandy soil.
  • Vocal alerting: tends to announce visitors or unusual sounds; training can channel this into a reliable "speak/quiet" cue.
  • Bold play style: energetic, physical games (tug, retrieve, flirt pole) often suit them better than passive play.
  • Independent problem-solving: may test boundaries; responds best to consistent rules and reward-based training.
  • Strong attachment: many form a tight bond with family and like to be involved in household activity.
  • Confident posture and "on patrol" routines: naturally scans territory and may choose vantage points near windows or gates.

Cultural Significance

Irish Terrier (Canis lupus familiaris) was bred in Ireland as a farm and house terrier for catching vermin, guarding, and companionship. Late-1800s dog shows made it a national symbol, and WWI messenger/sentry work showed it as brave, loyal, red terrier.

Myths & Legends

In 1800s Irish dog show stories, the Irish Terrier was 'the poor man's sentinel, the farmer's friend, and the gentleman's companion,' a saying showing the breed belonged to all classes and kept a brave heart.

Early breed histories recount the Irish Terrier as a classic all-around Irish farm dog-expected to hunt vermin, guard the homestead, and share the hearth-an origin story repeated in club writings as the breed's defining legend.

World War I anecdotes became part of the breed's folklore: Irish Terriers were remembered for carrying messages through shellfire and acting as steadfast sentries, stories often retold as proof of the breed's "daredevil" name.

Traditional Irish countryside storytelling around working terriers often praised a good red terrier as a household protector against rats and unwanted intruders, with the dog's courage treated as a near-mythic virtue in rural life.

Conservation Status

NE Not Evaluated

Has not yet been evaluated against the criteria.

Population Stable

Life Cycle

Birth 5 pups
Lifespan 14 years

Lifespan

In the Wild
13–15 years
In Captivity
11–16 years

Reproduction

Mating System Polygynandry
Social Structure Managed Domestic
Breeding Pattern Transient
Fertilization Internal Fertilization
Birth Type Internal_fertilization

As Canis lupus familiaris, Irish Terriers are naturally polygynandrous, but human-controlled breeding usually pairs one sire with one dam per estrus. Across the breed it stays polygynandrous because studs are reused or matings repeat. Gestation ~63 days; litters 4–8; care mostly by mother.

Behavior & Ecology

Social Pack Group: 2
Activity Diurnal, Crepuscular
Diet Omnivore Meat-forward complete dog diet (often poultry or beef-based) with high-quality animal protein

Temperament

Bold, spirited, and confident; more 'feisty' and reactive than the base species context of cooperative, pack-hunting wolves-selective breeding emphasized independent problem-solving and quick escalation to action typical of terriers.
High energy and endurance for a medium-sized dog; needs structured daily exercise (brisk walks/runs, sport training, fetch/tug with rules) plus mental work (scent games, obedience, puzzle feeding) to prevent frustration behaviors.
Strong prey drive and chasing tendency (a terrier hallmark); compared with many other domestic dogs, recall can be less reliable around small animals-leash/long-line use and secure fencing are common care requirements.
Alert, watchful, and often vocal when detecting novelty; can be a capable deterrent/guardian in the household context, with potential for nuisance barking if not trained.
Affectionate with family and typically good with respectful children when socialized; may be intolerant of rough handling-supervision and teaching child-dog boundaries are important.
Trainable but not automatically biddable; responds best to consistent, reward-based training with clear rules and short, varied sessions (terrier boredom threshold can be low). Harsh corrections can increase defensiveness.
Dog-social variation is wide (HUB note): from playful and social to dog-selective or same-sex competitive; early controlled socialization and ongoing reinforcement of calm greetings are key management practices.
Grooming/care requirement: harsh, wiry coat sheds relatively little but needs routine brushing and periodic hand-stripping or clipping to maintain coat texture and skin health; facial furnishings often need cleaning after meals/outdoors.
Irish Terriers can get skin allergies and itchy ears, hypothyroidism, and sometimes cataracts. They also face dental and joint problems (knees/hips). Health tests, weight control, and regular vet checks help.

Communication

Alert barking Often sharp/rapid when someone approaches the home
Growling/rumbling when threatened or guarding resources/space
Whining or high-pitched yips during excitement or frustration
Play vocalizations (short barks/grumbles) during tug/chase games
Intense eye contact and forward, confident posture to challenge or investigate; terriers often 'square up' more readily than many companion breeds
Tail and ear carriage (upright/forward when aroused; lowered/averted when unsure), plus weight shifts and freezing as early warning signals
Scent marking (urine marking, ground scratching) and investigative sniffing; domestic-dog context emphasizes territory/resource communication rather than coordinated pack-hunt signaling
Mouthy play and grab/tug behaviors (breed-typical); should be shaped with impulse-control cues to keep interactions socially appropriate
Play bows, pawing, and 'checking in' with the handler during exploration-bond-maintenance signals more emphasized than in the base wolf social system due to human partnership

Habitat

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 Island
Elevation: -3937 in – 16404 ft 3 in

Ecological Role

Domesticated omnivorous canid; companion animal and historical vermin-control working terrier

rodent and small-pest deterrence/control in farmstead settings (historical role) human companionship and support (social/working partner) participation in sport/working activities (e.g., obedience, agility) that reinforces human-animal bonds acts as a managed mesopredator in human environments; impacts local wildlife primarily through supervised/unsupervised predation pressure

Diet Details

Main Prey:
Rats and other rodents Rabbit Small birds and ground-nesting bird eggs Insects and other small invertebrates
Other Foods:
Berries and other fruits Vegetables Grains and starches Grasses and plant matter

Human Interaction

Domestication Status

Domesticated

Irish Terrier (Canis lupus familiaris) is a medium-sized working terrier from Ireland, bred for farm work, vermin control, guarding, and later companionship and sport. They are bold, have a strong prey drive, a wiry red coat, and are independent and vocal. They need daily exercise, training, socialization, coat care, and health checks.

Danger Level

Moderate
  • Bite/snap risk if fearful, mishandled, in pain, or poorly socialized-more likely during restraint/grooming without cooperative handling training
  • Protective/territorial barking and occasional reactivity toward strangers at thresholds (doors/yards) if not trained
  • High prey drive: may chase small animals; risk of accidental nips during arousal/play
  • Dog-dog aggression can occur (terrier tendency), creating indirect risk to humans attempting to break up fights

As a Pet

Suitable as Pet

Legality: Generally legal to own as a pet in the U.S. and most jurisdictions; may be subject to local leash laws, licensing, noise ordinances, and occasional breed-neutral "dangerous dog" regulations based on individual behavior. Verify housing/HOA and local ordinances.

Care Level: Experienced

Purchase Cost: $800 - $2,500
Lifetime Cost: $18,000 - $45,000

Economic Value

Uses:
Companion animal ownership Professional services (breeders, trainers, groomers, veterinarians) Dog sports/events and clubs Pet products retail (food, enrichment, fencing, grooming tools) Working/utility roles (historical and occasional modern vermin control/property alerting)
Products:
  • Puppies from reputable breeders or rescues (adoption/rehoming)
  • Training classes and private behavior consulting
  • Grooming/hand-stripping services and tools
  • Veterinary care, diagnostics, preventatives, insurance
  • Sport entry fees, equipment (agility, rally/obedience, scentwork), club memberships
  • Pet supplies: leashes/harnesses, enrichment toys, chew items, fencing/crates

Stouthearted and rugged, the Irish terrier is one of the original terrier breeds. With its fiery, typically red, wiry coat, the dog’s a mid-sized creature that’s suited to its roots in Ireland. Historically, Irish Terriers came in a variety of colors, but today they are recognized only in shades of red.

It has the great ability to be graceful, agile, and fast. It definitely has more energy than you. And this dog is mischievous. It’ll dig up the garden or claw through your shoes.

The dog’s noted for being stubborn and intelligent. It wants to play, run, and chase. The Ireland dog’s going to go after squirrels and rodents. While they take cues from their owner, in general, the Irish terrier is suspicious of strangers.

With early socialization, it’s great with kids. Expect your Irish terrier to enjoy life.

3 Pros and Cons of Owning an Irish Terrier

You’re going to love your Irish terrier, but trust that it’s going to be a handful. Here are three great things and three not-so-great things to take into account about having this dog in your home.

Pros!Cons!
Doesn’t shed too much
Shed hairs get trapped in the dog’s wiry coat until you brush them out. That makes the Irish terrier as close to hypoallergenic as it gets. You minimize pet dander in your spaces. This is a good pet for homes with people who suffer from respiratory problems.
The infamous terrier temperament
When it comes to temperament, this doggy tends to be similar. Quick to chase, persistent, quick to bark, feisty, lively, bossy, clever, independent, scrappy, stubborn, intense, impulsive.
Makes for a great family pet and watchdog
Despite a strong streak of independence, this is a dog that loves being around family. A vocal pet, it’s guaranteed you get a nice round of doggy alerts to any odd activity in your family’s perimeter.
It can be hard to find
The waiting lists for the Irish terrier are lengthy. Breeders can’t keep up with the demand. This trend tends to lean toward high price tags. Puppies are going to cost you a pretty penny. You may need to consider an adult dog from a shelter or rescue.
Dog’s Comfortable With Being Alone
These puppies are not prone to separation anxiety. So, unlike a lot of dogs, you won’t have to worry about them while you’re gone for the day. But you want them trained well before you start leaving the Irish terrier alone. Otherwise, expect your dog to get into trouble.
Mischievous
This terrier’s known for digging in gardens, clawing through closets, and just being plain busy. Stubbornness can make training difficult. It’s why early socialization and training of Irish terrier puppies is important.

History of the Breed

Irish terrier laying on dock with tongue out

It wasn’t until the late 19th century that this dog became known for its solid red color.

Irish terriers have been found throughout Ireland for centuries and are one of the older terrier breeds. While their exact date of inception is not known, it is believed they began in the late 19th century in Cork, Ireland, although there are images that appear to depict this breed dating back to the 18th century. It has been nicknamed the daredevil for its reputation of being courageous in the face of danger, as well as loyal and spirited, and it even served as a messenger and sentinel dog in World War I.

It is thought that they were bred from the now-extinct black and tan terrier, and early variations of the breed came in a wider variety of colors. It wasn’t until the late 19th century that this dog became known for its solid red color.

Size and Weight

Irish terrier playing outdoor winter time

Fully grown male and female Irish terriers will max out at 18 inches tall.

Most breeders will tell you all the rumors about Ireland’s most popular dog’s large size are an exaggeration. They are big dogs, but only when compared to other terriers. In the world of dogs in general, the Irish terrier is only medium-sized.

Fully grown male and female Irish terriers will max out at 18 inches tall. In terms of weight, the male tends to be slightly heavier than the female. Males can weigh around 27 pounds. The female Irish terrier will top out at 25 pounds.

Common Health Issues

There’s the possibility of any dog inheriting genetic health problems. Be wary of breeders who cannot offer a healthy prospect for their puppies. Reputable breeders will be open and honest about any issues you can expect from a breed.

In general, your Irish terrier is healthy but not completely safe from genetics. Here are the more common issues you might encounter.

  • Muscular dystrophy
  • Cataracts
  • Progressive retinal atrophy
  • Hyperkeratosis
  • Obesity

Temperament

Irish Terrier running out of flower bush

The Irish Terrier is known for its pluckiness, devotion, and curiosity.

The Irish terrier was bred to be a guard dog, companion, and hunter. Among its better qualities are being spirited, good-tempered, adaptable, and alert. It’s also known for its pluckiness, devotion, and curiosity. Of course, with the good comes the bad. The dog can be reckless, stubborn, strong-willed, and scrappy with other animals.

Your dog is extremely intelligent and will need mental challenges. Engage him through play and training, physical exercise, and firm, loving discipline. These dogs love people and will follow their cues when it comes to strangers or strange situations.

Training, heredity, and socialization influence the animal’s temperament. Early exposure to sights, experiences, sounds, and different people is the best way to develop a well-rounded dog.

Puppies can be playful and curious, willing to interact with people. Your best bet is middle-of-the-road puppies. When talking with breeders, shops, or rescue staff, ask about a dog’s aggressiveness and how it behaves with other animals.

How To Take Care of an Irish Terrier

Once trained, this dark, black, or red dog doesn’t need a lot of attention. It’s a healthy and strong animal, both mind- and body-wise. The Irish terrier needs playtime and exercise. Someone will have to groom it regularly.

The Best Dog Food

beautiful Irish terrier dog portrait outdoors

A highly active dog like your Irish terrier will require more energy than an older, couch potato pet.

The recommended feed for the Irish terrier is one to 1.5 cups of quality dry dog food. You should divide this into two meals over the day.

What and how much your dog eats are dependent on age, size, build, activity level, and metabolism. Not all dogs need the same amount of food. A highly active dog like your Irish terrier will require more energy than an older, couch potato pet.

Avoid overfeeding. If you need to check its weight, place your hands on its back. Keep the thumbs along the spine and spread your fingers downward. If you can’t feel its ribs without pressing down, you may want to reconsider how you’re feeding it and get a little more exercise in.

Many owners have success giving their dogs a freeze-dried raw diet for less processed, higher protein, and more satisfying nutrition.

Maintenance and Grooming

The short, dark, red, or black coat of the hypoallergenic Irish terrier needs stripping, brushing, and trimming regularly, perhaps twice a week. This will remove loose hair and dirt. It has a dense, wiry coat that hugs it, creating a tight jacket. There’s a softer coat beneath that keeps it warm on unpleasant days. Trim its nails too. Long nails can make the dog uncomfortable.

Brush the teeth several times a week to remove tartar and bacteria. Also, the terrier has a unique set of ears. The puppies may need “training” to achieve the V-shaped fold of the ears that gives these dogs that Irish rogue demeanor. That entails gluing and taping the ears down until they fall right. This best takes place between four to eight months of age. Have a consult with your breeders to learn how to do it.

Training

Irish terrier playing with ball

The Irish terrier picks up on commands and tricks easily, as it’s very clever.

Your Irish terrier is a tough nut to crack. Independent and strong-willed, it’ll dismiss training as if there are other things to do. This is why training needs to start early, hopefully when they’re puppies.

The Irish terrier picks up on commands and tricks easily, as it’s very clever. Positive reinforcement helps, but avoid long training sessions. It’ll get bored and simply stop paying attention.

Exercise

Healthy Irish terriers need at least an hour a day of physical activity. It can run with you or have a great time at all varieties of dog sports. Doggy can run for hours and manage half-day hikes with no stress.

These are not necessarily apartment dogs. It’d be comfortable with an enclosed yard for burning off steam. The dog’s flushed with energy, but once burned off, it can relax on the couch.

Puppies

Irish soft coated wheaten terrier puppy

These terriers are prone to expensive eye conditions, so breeders should have a certificate from the Canine Eye Registry Foundation that’s no more than a year old.

They are hard to find, but locating an Irish terrier isn’t an impossible mission. You might find these puppies at (i) a public animal shelter ready for adoption, (ii) a dog rescue operation, or (iii) a reputable breeder. Once you find a dog, look for online reviews to find out if the breeder has a reputation for healthy puppies.

As these terriers are prone to expensive eye conditions, breeders should have a certificate from the Canine Eye Registry Foundation that’s no more than a year old.

Irish Terrier And Children

A legend says leprechauns give Irish terriers to children. The dog’s energy level and size do make them great companions for kids. But if children are young, supervise all interactions.

Training should include puppies not being mouthy and rough. Teach children not to hit the dog, or pull on the ears or tail. Children must never approach a dog while it’s sleeping. They need to know to never disturb an eating dog or try to take the dog’s food away.

Dogs Similar to Irish Terriers

As stated, the Irish terrier is going to be a tough find. Here are three similar dogs you can consider making a family member.

  • Welsh Terrier: The Welsh terrier has the same spirit and alertness as any member of the terrier family. Breeders say what distinguishes the Welshman is that the dog is a little calmer and game, but not necessarily as stubborn.
  • Airedale Terrier: This one’s referred to as “The King of Terriers.” It does have a regal stance and has earned the titles of athlete, hunter, and trusted companion.
  • Lakeland Terrier: These are big dogs in small bodies. The Lakeland terrier is famous for being confident, bold, and friendly. It’s named for its native England’s Lake District. A farmer’s work dog, it was bred to work in packs against sheep-attacking foxes.

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Sources

  1. Your Pure Bred Puppy / Accessed March 29, 2021
  2. Pet Finder / Accessed March 29, 2021
  3. Vet Street / Accessed March 29, 2021
  4. Dog Breed List / Accessed March 29, 2021
  5. Dog-Learn / Accessed March 29, 2021
  6. Spirit Dog / Accessed March 29, 2021
  7. Dog Breed Plus / Accessed March 29, 2021
  8. Orvis / Accessed March 29, 2021
  9. Dog Time / Accessed March 29, 2021
Melissa Bauernfeind

About the Author

Melissa Bauernfeind

Melissa Bauernfeind was born in NYC and got her degree in Journalism from Boston University. She lived in San Diego for 10 years and is now back in NYC. She loves adventure and traveling the world with her husband but always misses her favorite little man, "P", half Chihuahua/half Jack Russell, all trouble. She got dive-certified so she could dive with the Great White Sharks someday and is hoping to swim with the Orcas as well.
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Irish Terrier FAQs (Frequently Asked Questions)

A purebred, the Irish terrier originated on the Emerald Isle as a worker dog. They’re called the farmer’s friend, the poor man’s sentinel, and the gentleman’s favorite. The dog’s rugged, stout, loyal, and makes an excellent companion.