Looking from behind, the hocks must be straight. Feet Round, hard padded, wide, of cat-like appearance, neither turning in nor out. Tail Should be set rather high, carried gaily and in proportion to body length, usually about four inches long, providing a good hand-hold. Coat Smooth, without being so sparse as not to provide a certain amount of protection from the elements and undergrowth. Rough or broken coated, without being woolly.
Brindle markings are unacceptable.
Gait Movement should be free, lively, well coordinated with straight action in front and behind. Special Notes Old scars or injuries, the result of work or accident, should not be allowed to prejudice a terrier's chance in the show ring unless they interfere with its movement or with its utility for work or stud. A Jack Russell Terrier should not show any strong characteristics of another breed.