Country of origin: United States Bred for: Farm dog and ratter Group: Terrier Color: White, black, dark to light shades of tan, mahogany red, and chocolate, blue and blue fawn; orange to faded yellow shades of apricot and lemon Life span: 12 to 18 years Grooming Needs: Brush frequently to control shedding; bathe as needed Coat: Short, dense, and smooth Size: Minature: up to 13 inches; Standard: 13-18 inches, 8-25 pounds Temperment: Eager to please, playful, energetic, territorial Training: Highly trainable Energy: High Children: Good Compatibility with other dogs: Good Health Concerns: Allergies, bite problems, (undershot or overshot), retained puppy teeth or missing teeth, luxating patellas (kneecaps that slip), demodetic mange, and occasional incidenses of hip and elbow dysplasia