If you live in a city or the suburbs, your Jack Russell will want plenty of walks and excursions. Amazingly athletic and bursting with energy, they have natural instincts to hunt, track and solve problems in the wild. Traitsĭon’t be surprised by the small size: Jack Russell Terriers can be a handful. Jack Russell Terrier coats are smooth but tough enough to be protective, and the colors are typically white with black, tan or brown. The tail is normally in proportion to body length, set high but not curled up. They have muscular necks that slope down to a fairly shallow chest, strong front legs and muscular hindquarters. Their heads are typically flat with some width at the ears, a medium-length muzzle, black nose, alert almond-shaped eyes, a strong jaw and muscular cheeks. Height: 10 – 15 inches (25.40 – 38.10 cm)Ībout as long as it is tall, a typical Jack Russell is small, sturdy and strong.