Powering treadwheels for hours, hunting badgers and foxes, keeping rats under control: the FCI standard describes this terrier’s former life in Ireland’s barren Glen of Imaal. The same text now calls it a gentle, responsive family dog.
| FCI | Group 3 (Terriers), Section 1 Large and medium-sized Terriers, Standard No. 302, without working trial |
|---|---|
| Country of origin | Ireland |
| Size (height at the withers) | males no more than 35.5 cm, females proportionately less |
| Weight | males 16 kg, females proportionately less |
| Life expectancy | median 12.1 years in a UK analysis of 584,734 dogs (McMillan et al. 2024) |
| Coat | medium-long, harsh with soft undercoat; may be tidied to create smooth, neat outlines |
| Colours in the standard | blue brindle without black tinge, or wheaten from pale to reddish gold; mask usually black-blue, dark markings lighten with age; black-and-tan disqualifying |
A dog for hard-working farms
The old breed was long ignored, says the standard. Glen farmers descended from soldiers granted land for serving the British Crown in the 16th and 17th centuries. A dog unable to keep up was not tolerated. The Irish Kennel Club recognised the breed in 1934. Its best-known compatriot is the red Irish Terrier.
Quieter than other terriers
Active, agile and silent at work, determined and very courageous when needed, otherwise gentle and responsive: the standard’s description. Considered less excitable than other terriers, but always ready to pursue. A cat outside turns the relaxed housemate suddenly fast.
Short, bowed forelegs
The standard requires short, bowed forelegs with slightly turned-out feet and faults a straight front. A Finnish study compared 53 Glens with Dachshunds and Skye Terriers, three short-legged, chondrodysplastic breeds (Lappalainen et al. 2022). Glens had the greatest outward forelimb rotation, averaging 34 degrees. Lameness appeared in 15 percent of examined forelegs, more often than in the other breeds, with pain most commonly at the wrist. The authors recommend using such measurements in breeding selection. Related questions arise for the Dachshund and Skye Terrier.
Eyes and lifespan
An inherited retinal disease, cone-rod dystrophy crd3, occurs in Glens, caused by an ADAM9 deletion. Cone function is already poorer at 15 months, with rods deteriorating later, although vision problems may begin very late (Goldstein et al. 2010; Kropatsch et al. 2010). Healthy carriers make testing both parents worthwhile. For lifespan, 113 Glens reached a median of 12.1 years in McMillan and colleagues’ analysis, virtually matching crossbreeds at 12.0. The sample is small.
Measured exercise and grooming
Long sniffing walks, searching games and scent work suit better than jumping sports that strain the forequarters. Hand-strip the rough coat several times yearly and brush between sessions. The standard describes docking puppies’ tails to half length, permitting natural tails where docking is prohibited. In Germany, docking is generally prohibited under Section 6 of the German Animal Welfare Act, so you should meet a Glen with a natural tail.
Who will enjoy a Glen, and who will not?
A good match for calm families and individuals wanting a powerful, relaxed dog with moderate exercise needs, asking breeders for foreleg X-rays and crd3 tests. The wrong choice for jogging or agility.
Assess whether a calm, short-legged terrier suits you through the breed quiz; our book “Which Dog REALLY Suits You?” (book in German) gives a more thorough assessment. For the first puppy days, the free Puppy Starter Pack helps. Capture your Glen as a dog portrait from your own photo or an instant-download digital artwork.
Further reading
- Dachshund: the back that shapes a whole life
- Is my dog overweight? Assessing body condition and ideal weight
- Puppy checklist: essentials and the first 3 days
Sources, accessed on 20.10.2026: FCI Standard No. 302 Irish Glen of Imaal Terrier (fci.be, German version dated 20.09.2024, valid standard published on 03.09.2024) and FCI breed page No. 302; McMillan KM et al., Longevity of companion dog breeds: those at risk from early death, Scientific Reports 2024; Lappalainen AK et al., Breed-typical front limb angular deformity is associated with clinical findings in three chondrodysplastic dog breeds, Frontiers in Veterinary Science 2022; Goldstein O et al., An ADAM9 mutation in canine cone-rod dystrophy 3 establishes homology with human cone-rod dystrophy 9, Molecular Vision 2010; Kropatsch R et al., Generalized progressive retinal atrophy in the Irish Glen of Imaal Terrier is associated with a deletion in the ADAM9 gene, Molecular and Cellular Probes 2010.
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