Fox Terrier usually means the Smooth Fox Terrier or the Wire Fox Terrier, two related breeds that share a build and a personality but differ in coat. Both came from Britain, where they rode along on foxhunts and bolted foxes from their dens. That's why they're mostly white: hounds and riders could tell them from the fox. The Toy Fox Terrier is a separate, much smaller breed.
Fox Terriers tend to be bold, quick and funny, with a strong prey drive and a mind of their own. Patient, varied training works better than repetition. The Smooth's short coat is easy to keep, while the Wire's dense coat sheds little but needs clipping or hand-stripping, so grooming costs depend on the coat. Shelter listings in Chesapeake may also include terrier mixes, so look closely at each dog's coat, size and energy.