The Glen of Imaal Terrier (Irish: Brocaire Uí Mháil) is a rare Irish dog breed from County Wicklow, Ireland, and one of the four original Irish terrier breeds native to Ireland. It is sometimes called the Irish Glen of Imaal Terrier or the Wicklow Terrier, and fanciers often shorten the name to just "Glen."
Gentler and less excitable than most terriers, but still bold and spirited, the double-coated Glen is named for one of Ireland's most remote locales. The brave but docile Glen is a strong, no-fuss dog built for hard work — bred for hunting vermin and general farm work, known for its strength, low stature, and unusually quiet nature for a terrier.
A "Big Dog on Short Legs"
The Glen of Imaal Terrier is indigenous to the wild, barren region of the same name in the Wicklow Mountains, located on the eastern seaboard of Ireland. The region's farmers developed the breed in the 17th and 18th centuries, descended in part from dogs brought by Flemish and Hessian soldiers who had been given the land in the late 16th century as payment for service to the British Crown. Surviving in this bitter locale required every resource available to farmers — dogs who couldn't make themselves useful would not last long.
Long and low to the ground, with a powerful head and bowed legs, Glens guarded livestock, hunted badger, fox, and otter, and dispatched vermin of all sorts around the farmstead. Like the Sealyham and Dandie Dinmont Terriers, the Glen was purposely developed to be closer to the ground and stockier, making it an optimal badger dog — its punishing jaws and short-legged body enabled it to spar with stronger, fiercer quarry. When digging, the bowed front legs and turned-out feet proved ideal for throwing dirt out to the sides, rather than back into the hole.
One of the Glen's former odd jobs gave it the nickname "turnspit dog" — people used their Glens to walk on a treadmill contraption that turned meat over a cooking fire, and their powerful front legs served them well in the task. In his 1576 book The Noble Art of Venerie and Hunting, George Turberville described two sorts of terriers, one of which had crooked legs and originated from Flanders, writing that "those with the crooked legges will take the earth better than the other, and are better for the badger."
A Rare Breed, Revived in the 20th Century
Once nearly extinct, the Glen was revived in the 20th century. The breed was recognized first by the Irish Kennel Club in 1934 and most recently by the American Kennel Club in 2004. The Canadian Kennel Club voted to fully recognize Glens in 2017 after the breed spent years on the Miscellaneous list.
Today the Glen remains one of the rarest breeds of dog — in the US, living registered animals number in the hundreds, and it's the least-known Irish terrier breed. It is considered a vulnerable native breed by the UK's Kennel Club, which tracks breeds in which fewer than 300 puppies are registered each year. The current global Glen population size is estimated at around 3,100.
Maximum Substance for Size
The Glen of Imaal Terrier is an achondroplastic dwarf breed — a "big dog on short legs." It's more substantial than might be expected from photographs; a typical adult Glen weighs about 36 pounds and stands 14 inches tall at the withers. The AKC breed standard specifies a height of 12 to 14 inches and a weight of approximately 35 pounds for males, with a length-to-height ratio of 5:3. Many champion Glens are larger, with some exceeding 40 or even 45 pounds. With three growth stages, a Glen can take up to four years to reach full maturity.
Glens have a large head, with rose or half-prick ears; short, bowed legs; and a straight topline that rises slightly toward the tail. The shoulders, chest, and hips are sturdy and muscular, giving the impression of "maximum substance for size," with the front feet turned out. The breed is considered unrefined, with antique features that were common in early terriers. As one expert puts it, "When they look at this breed, judges should think 'antique.' The head should be disproportionately large, and the dogs should look like rough and ready working terriers."
Silent While Working, Gentle at Home
The Glen of Imaal Terrier is game and spirited with great courage when called upon, otherwise gentle and docile. Unlike most terriers, the Glen is typically a quiet companion — it was specifically bred for this trait, and the breed standard describes these dogs as silent while working. Their bark is deep and authoritative, like that of a much larger dog, and they are said to be good watchdogs.
Glen of Imaal terriers can be energetic and tenacious, but they tend to be more even-tempered, more easygoing, and less vocal than most other terriers. While they love activity, they are not demanding and are happy to relax by their owner's side. They are typically fearless and loyal, superb with people including children, and known for a placid, agreeable nature. As one fancier says, "They break all the terrier rules."
Exercise and Activity
Glens are active dogs with moderate energy levels, requiring an outlet for physical exertion and mental stimulation. They often do well at Earthdog trials, Barn Hunt, and in agility. Although not typically strong swimmers due to their short legs and dense body, some Glens can work in water, and others have been trained to herd and drive sheep and cattle.
| Dog | Daily exercise | Notes |
|---|---|---|
| Puppy | 3–4 short play sessions of 10–15 minutes | Keep walks gentle; avoid hard surfaces while growing |
| Adult | 30–45 minutes total walk or play | Split into two shorter sessions if preferred |
| Senior | 20–30 minutes of gentle walking | Slow the pace and shorten distance with age |
They're curious, so caution is recommended in unfamiliar situations — keep them secure in a fenced yard or on a leash so they don't chase small critters like squirrels. The Daily Exercise Guide offers ideas for this moderate-energy terrier.
Training a Glen of Imaal Terrier
Glens are very intelligent but independent — those traits make them highly trainable but not necessarily easy to train. As terriers, they can have a stubborn streak, though they learn quickly and socialize easily. It helps to remember the breed's history: Glens were used to dispatch badgers and work independent of the owner, unlike herding breeds bred to work with a handler, so don't be surprised if your initial request to a Glen is met with resistance.
They respond well to praise and are sensitive to scolding. Because most Glens develop a robust prey drive by maturity, they need to be well-socialized with other animals when young — particularly with small household pets they might mistake for quarry, such as cats and rabbits. The Dog Training Guide and Puppy Care Guide offer a solid foundation.
Grooming a Glen of Imaal Terrier
The Glen has a medium-length, wiry double coat that doesn't shed much but has specialized grooming needs. It requires regular brushing and periodic hand-stripping to maintain its distinctive harsh texture.
| Task | Frequency | Notes |
|---|---|---|
| Brushing | 2–3 times a week | Brush in the direction of the coat and check for tangles |
| Bathing | Every 6–8 weeks or as needed | Use a mild dog shampoo |
| Nail trimming | Every 3–4 weeks | Trim when you hear nails clicking on the floor |
| Ear checks | Weekly | Look for wax, redness, or odor |
| Teeth brushing | 2–3 times a week | Dental chews help as a supplement |
| Professional trim or clip | Every 6–8 weeks | Keeps the coat tidy and hygienic |
Routine care includes nail trimming, ear cleaning, and tooth brushing. The Dog Grooming Guide covers caring for a wiry-coated terrier.
Feeding a Glen of Imaal Terrier
A Glen of Imaal Terrier should be fed high-quality food appropriate to its age, size, and activity level, typically in two meals per day. Some Glen fanciers report their dogs do well on a diet somewhat higher in protein than other breeds.
| Life stage | Meals per day | Portion per meal (approx.) | Notes |
|---|---|---|---|
| Puppy (under 6 months) | 3–4 meals | 1/3–1/2 cup | Use a small-breed puppy formula |
| Adult | 2 meals | 1/2–3/4 cup | Adjust to activity level and body condition |
| Senior (7+ years) | 2 meals | 1/2 cup | Consider a senior or joint-support formula |
Your veterinarian can recommend the right diet and portions.
Health and Veterinary Care
Glen of Imaal Terriers usually have a lifespan of 10 to 15 years and are a healthy dog breed not known for many major health problems. Their achondroplastic (dwarf) build and bowed legs mean keeping them at a healthy weight is important, and responsible breeders screen their stock.
| Check-up | Frequency | Notes |
|---|---|---|
| Wellness exam | Annual | Includes dental and weight check |
| Vaccinations | Annual booster | Follow your veterinarian's schedule |
| Heartworm prevention | Monthly (or as advised) | Year-round in most regions |
| Dental check | Annual cleaning as recommended | Watch for tartar buildup |
| Patellar luxation and eye screening | Discuss with your vet | Breeder screening (OFA/CERF) |
| Senior wellness checks | Start from age 7 | Early detection of age-related conditions |
The Signs of a Healthy Pet guide is a useful home checklist.
Home Environment
A Glen of Imaal Terrier thrives in an active home with close human companionship, enjoying the company of children and adults alike. With a generally calm and quiet disposition but a streak of silliness, a Glen can make an excellent pet for an active family — though it's important to have an accurate idea of how strong these dogs are.
Well-trained and socialized Glens typically are good around people, though they might be somewhat reserved around strangers. They don't always get along with other dogs, and they might perceive smaller animals as prey. Their complex characters mean they're not the perfect fit for every household. If you're weighing whether a Glen fits your life, the Choosing the Right Pet guide can help you compare honestly.
Common Ownership Challenges
Owning a Glen of Imaal Terrier means committing to a rare breed with specialized grooming needs, a high prey drive, and an independent streak. Not many Glen puppies are born each year, so the breed remains rare with few breeders. They need training and socialization to be well-mannered, may not always tolerate other dogs, and may view small pets as prey.
Yet for the right owner, the Glen is incomparable — a "living history" terrier that is gentle, affectionate, and quiet, yet game and spirited when called upon. Unless, of course, you're a badger.
Advantages and Disadvantages
Advantages
- Quiet and gentle — breaks the terrier rules
- Affectionate, loyal, and superb with children
- Low-shedding wiry coat
- Healthy breed with few major problems
- Good watchdog with a deep bark
- Fearless and game when needed
Disadvantages
- Very rare — few breeders, hard to find
- High prey drive
- Independent and stubborn streak
- Specialized grooming needs
- May not get along with other dogs
- Takes up to 4 years to mature
Frequently Asked Questions
How big do Glen of Imaal Terriers get? 12.5–14 inches tall; 32–40 pounds.
How long do Glen of Imaal Terriers live? Typically 10 to 15 years.
Are Glen of Imaal Terriers good family dogs? Yes — affectionate, gentle, and superb with children.
Are Glen of Imaal Terriers easy to train? Intelligent but independent — trainable but not always easy.
Are Glen of Imaal Terriers good with other dogs? They don't always get along with other dogs.
Are Glen of Imaal Terriers rare? Yes — among the rarest breeds, global population ~3,100.
Do Glen of Imaal Terriers bark a lot? No — unusually quiet for a terrier, silent when working.
Are Glen of Imaal Terriers good with cats? Prey drive means caution with small household pets.
What were Glen of Imaal Terriers bred to do? Hunt badgers, foxes, and vermin; general farm work.
Are Glen of Imaal Terriers good watchdogs? Yes — deep authoritative bark, good watchdogs.
Do Glen of Imaal Terriers shed much? Minimal shedding, but the coat needs regular maintenance.
What health problems do Glen of Imaal Terriers have? Few major problems; a generally healthy breed.