Terrier is a type of dog rather than a single breed, and the word covers everything from tiny Yorkshire Terriers to the much larger Airedale. The name comes from the Latin terra, meaning earth, because these dogs were developed over several centuries to hunt rats, foxes and other vermin, often by going underground. Adoptable terriers are usually small to medium mixes, often with Jack Russell, Rat, Cairn, Schnauzer or Chihuahua in their background.
Most weigh 10 to 35 pounds and have wiry or smooth coats and a lively, confident outlook. That digging and chasing instinct matters on Chapel Hill's wooded trails and in its yards, where squirrels are a constant temptation. Barking, tunneling and a stubborn streak are common, so patient training helps. A dog's size, coat and energy depend on its ancestry, so meeting the dog says more than the label.