Do Cairn Terriers require fenced yards?
Because of their highly developed chase instinct, cairn terriers can NEVER be off-leash unless they are in a securely fenced area. The most highly trained cairn will take off after a small animal like a squirrel with no regard for danger. The Cairn Rescue League does not require that an adoptive home have a fenced yard, but we do require that the cairn will never be off-leash unless in a securely fenced area.