Terrier describes a group of dogs developed over several centuries, mostly in Britain, to hunt rats, foxes and other vermin, often by following them underground. The name comes from the Latin for earth. Dozens of breeds carry the label, and on adoption pages it usually means a small to medium dog with terrier looks, often a mix of Jack Russell, Rat, Cairn, Schnauzer or Chihuahua lines.
Expect a wiry or smooth coat, a confident stride and a big personality in a body of roughly 10 to 35 pounds. Terriers tend to be loyal and affectionate, but barking, digging and chasing squirrels or cats come with the territory. In York, where many homes are attached rowhouses with small yards, that means secure fencing, a sturdy leash and training that starts early. Ancestry varies, so a dog's size and energy are best judged by meeting it.