The Kerry Blue Terrier is a medium-sized terrier of balanced, muscular construction that presents an upright, alert, and confident bearing. Males stand 18 to 19.5 inches at the shoulder and weigh 33 to 40 pounds, with females slightly smaller. The overall impression is of a well-built, athletic dog that is capable of the varied working tasks - hunting, herding, retrieving - that the breed historically performed in Ireland, and the construction supports that capability rather than being merely decorative.
The head is one of the breed's most characteristic features. It is long and lean with a flat, moderately narrow skull and strong stop. The muzzle is strong and deep, in proportion to the skull, and is covered by the abundant beard and whiskers that give the Kerry Blue its distinctive face. The beard is a defining visual element and is trimmed to a specific shape in show dogs - flowing forward and outward to frame the face. The nose is black, the lips are tight, and the bite is scissors or level.
The eyes are small to medium, dark hazel to dark brown, and set with a forward-facing, keen expression that communicates the terrier alertness and intensity characteristic of the breed. Dark, well-placed eyes are important to the Kerry's expression - light or round eyes significantly change the face and are faulted in the standard. The ears are small, V-shaped, folded forward at a point above skull level, and carried close to the cheeks. The ear fold is characteristically above the level of the skull rather than level with or below it, which contributes to the terrier look.
The neck is strong, moderately long, and carries the head upright. The body is compact and muscular: a level, short back, a well-sprung ribcage, a deep chest with adequate lung room, and a short, strong loin. The overall body is square to slightly longer than tall, but the impression is of compact athletic capability rather than either the elongation of some terrier types or the cobby heaviness of others. The tail is set high, carried erect, and traditionally docked in countries where docking is permitted. In countries where docking is prohibited, the natural tail is long and tapered.
The legs are straight and well-boned in front, with correctly angulated hindquarters that provide the rear drive characteristic of a working terrier. The feet are round and catlike, with thick black pads. Movement is free and straight, with good drive from the hindquarters and equal reach in front - the Kerry Blue should move with the purpose and efficiency of a dog built to cover varied terrain.
The coat is the breed's most distinctive physical characteristic. It is a soft, dense, wavy coat with a texture that is genuinely unique among terriers - not wiry and harsh like most terrier coats, not straight and smooth, but a soft wave that lies close to the body and has a slight natural sheen. The coat is a single coat without the undercoat present in double-coated breeds, which is why it does not shed. Instead it grows continuously and must be trimmed regularly.
The color - the blue - is what defines the breed's identity. All shades from deep slate blue through silver blue are acceptable, and the correct shade for any individual is considered whatever shade it reaches as an adult after the clearing process is complete. The blue is a dilution of black pigment, and it is entirely unique to the breed among Irish terriers. Puppies are born black and begin the gradual color change process within weeks, moving through various intermediate brown, tan, and mixed shades before the adult blue emerges. The clearing process is not predictable in its exact pace or final shade, and two puppies from the same litter may end up at quite different points on the blue spectrum.
In show presentation the coat is scissored and shaped into the characteristic Kerry silhouette: the head presented with the full beard and whiskers framing the face, the body coat trimmed to show the muscular outline, the legs presented with moderate furnishings that suggest bone and substance without being excessively fluffy.
The overall silhouette of a correctly presented Kerry Blue is one of balanced, athletic medium terrier: upright, alert, with the long lean head and profuse beard providing a distinctive profile that is unlike any other terrier in the group. The blue coat and the confident, self-possessed stance together make the Kerry Blue one of the more visually arresting terrier breeds when it is standing well.
Sexual dimorphism is moderate. Males are somewhat more substantial in bone and head size than females, with a broader, more powerful expression. Females have a somewhat lighter, cleaner build. Both sexes share the characteristic coat, the essential proportions, and the alert, forward-looking expression that defines the breed across sex and individual variation.
Affectionate With Family
★★★★★
Unusually devoted for a terrier, the Kerry Blue attaches strongly to its family and shows genuine warmth and enthusiasm with the people it lives with. This is not an aloof or independent breed in its emotional relationship with its household.
Good With Young Children
★★★★☆
Energetic and playful in a way that suits older children especially well, the Kerry Blue is a genuine family participant. Very young children and the breed's boisterous energy call for supervision, but the tolerance and affection for family kids is real.
Good With Other Dogs
★☆☆☆☆
Same-sex dog aggression is a well-documented and defining characteristic of the Kerry Blue Terrier. The breed is best kept as the only dog, and introductions to other dogs require management and realistic expectations.
Shedding Level
★☆☆☆☆
The Kerry Blue's single, non-shedding coat does not leave hair on furniture or clothing - a genuine advantage for households sensitive to dog hair. The coat grows continuously rather than shedding seasonally.
Coat Grooming Frequency
★★★★☆
The continuously growing coat requires regular scissoring and trimming every 4 to 6 weeks to maintain correct shape and cleanliness, plus brushing two to three times per week to prevent matting. Professional grooming or dedicated owner grooming is a real time commitment.
Drooling Level
★★☆☆☆
The Kerry Blue's distinctive beard traps water and food and drips somewhat after drinking. Modest drooling and beard wetness are facts of life with this breed.
Coat Type
★★★★☆
A soft, wavy, non-shedding single coat that grows continuously and requires regular trimming. The coat's signature blue-gray color develops gradually from black over the first 18 months of life.
Openness To Strangers
★★★☆☆
Not hostile toward strangers but not immediately effusive either. The Kerry Blue checks people out with typical terrier confidence before deciding how much enthusiasm the situation deserves.
Playfulness Level
★★★★★
Exuberant, quick, and enthusiastic about play throughout its life. The Kerry Blue has a particular talent for inventing games and a tendency to recruit everyone in the household into participating whether they planned to or not.
Watchdog/Protective Nature
★★★★☆
Alert and vocal when something warrants attention, with enough protective instinct to take the role seriously. The Kerry Blue is not a passive observer of unusual activity around its home.
Adaptability Level
★★★☆☆
Adaptable to a range of living situations provided exercise needs are met. The Kerry Blue can manage smaller homes with sufficient daily activity but is not well-suited to sedentary or confined lifestyles.
Trainability Level
★★★☆☆
Intelligent and capable of learning quickly, the Kerry Blue also has the terrier tendency to evaluate whether your request is worth its time. Positive reinforcement and keeping training interesting yields better results than drilling.