Cairns are working dogs and are still used as such in parts of Scotland. Cairn Terriers generally adapt well to children and are suitable family dogs.
Animals & Wildlife Magazine
Cairn Terriers are intelligent, lively, strong, and loyal. Like most terriers, they love to dig after real or imagined prey. Cairn Terriers have a strong prey instinct and will need comprehensive training. However, they are reasonably intelligent and, although willful, can be trained. Although it is often said that they are disobedient, this is not the case provided correct training is applied.