Called the King of Terriers because it's the largest of them, the Airedale was developed in the mid-1800s by mill and factory workers in Yorkshire's Aire Valley. Crossing old black-and-tan terriers with the Otterhound produced a tough, versatile dog that hunted rats and otters, swam well and later carried messages in World War I. Adults usually weigh 45 to 70 pounds and stand 22 to 24 inches, with a wiry black-and-tan coat and a bearded face.
Many Airedales are clever, confident and playful, with a sense of humor and a stubborn streak. They tend to bond closely with their families but bore easily, so varied training and daily exercise help. The coat sheds little yet needs regular clipping or hand-stripping, and a strong urge to chase small animals is common. Dogs vary, so a dog's own history and behavior matter more than the breed label.