The Kerry is enthusiastic but strong-willed, so training can be a challenge. The Kerry Blue Terrier's thick, wavy coat requires regular grooming to maintain a smart, tailored appearance. The head is long, but proportionate to the size of the body. When viewed from the side, the skull and muzzle are of roughly equal length, parallel to one another, and joined by a slight stop. The skull is flat and of moderate width, tapering slightly toward the muzzle.
Cheeks are flat and clean.
The muzzle is sufficiently wide and deep to balance the skull. The underjaw is strong. There is a minimum of falling away under the eye, giving a moderately chiselled look. Lips are tight and darkly pigmented. The Kerry Blue Terrier has a complete set of good-sized, evenly spaced, white teeth.