The ideal Kerry should be 18-1/2 inches at the withers for a male, slightly less for the female. The most desirable weight for a fully developed male is from 33-40 pounds, females weighing proportionately less.
Kerry Blue Terriers are strong-headed and highly spirited. They have always been loyal and affectionate towards their owners and very gentle towards children. In the early days of competitive dog showing the Irish Kennel Club required Kerries to pass a "gameness" test, known as Teastas Mor certification, before they were deemed worthy of being judged. These tests included catching rabbits and bringing a badger to bay in its set. They are fast, strong, and intelligent. They do well in obedience, dog agility, sheep herding, and tracking. They have been used as police dogs in Ireland. Modern breeders have attempted to retain high spirits whilst breeding out aggression.
As a long-legged breed, the activity level of the Kerry Blue Terrier ranges from moderate to high. They require an active, skilled owner who can provide them with early socialization and obedience training. Kerries require daily exercise.
Kerries are fairly healthy, however there are some genetic disorders that are prevalent in the breed. They are prone to eye problems such as keratoconjunctivitis sicca (dry eyes), cataracts, and entropion. They sometimes get cysts or cancerous growths in their skin, but these are rarely malignant. Hip dysplasia, hypothyroidism, and cryptorchidism have also been reported. Another skin-related health issue is spiculosis. This is a skin disorder that produces abnormally thick hairs that are also called thorns, spikes, or bristles.
Progressive neuronal abiotrophy (PNA) is also seen. This condition is also referred to as canine multiple system degeneration (CMSD), cerebellar cortical abiotrophy (CCA) or cerebellar abiotrophy (CA). This is a progressive movement disorder that begins with cerebellar ataxia between 10 and 14 weeks of age. After 6 months of age, affected dogs develop difficulty initiating movements and fall frequently. The gene responsible has been mapped to canine chromosome 1.
