The Jack Russell Terrier is a small terrier that has its origins in fox hunting in England. It is principally white-bodied and smooth, rough or broken-coated and can be any colour. Following World War II, the requirement for hunting dogs drastically declined, and with it the numbers of Jack Russell terriers. Following World War II, the requirement for hunting dogs drastically declined, and with it the numbers of Jack Russell terriers. The dogs were increasingly used as family and companion dogs. In 1983, the Parson Jack Russell  Club of Great Britain (PJRTCGB) was resurrected to seek Kennel Club recognition for the breed. They have a tremendous amount of energy for their size, a fact which can sometimes lead to trouble involving larger animals. They may seem never to tire and will still be energetic after their owner has called it a day. While socialised members of the breed are friendly towards children, they will not tolerate abuse even if it is unintentional.