Parson Russell Terrier

Terriers

Small

Median 13.8 y

FCI group 3 · Terriers · Derived from the adult weight midpoint (6.8 kg)

Median survival across 3,776 UK dogs (VetCompass, McMillan 2024) · half live 11–16 y

The Parson Russell Terrier is an English breed of small white terrier that was the original Fox Terrier of the 18th century. The breed is named after the Reverend Jack Russell, credited with the creation of this type of dog. It is the recognised conformation show variety of the Jack Russell Terrier and was first recognised in 1990 in the United Kingdom as the Parson Jack Russell Terrier.

Clever

Athletic

Friendly

Summary from Wikipedia (CC BY-SA) · reference ranges from the Kintail breed dataset

Adult weight

Reference

Male

5.9–7.7 kg

Female

5.9–7.7 kg

The breed standard (the American Kennel Club)

Weight for age

Stock data

Male

Female

Expected range

Expected range from the breed's own adult weight, kilograms. Growth reference: Salt et al. 2017, WALTHAM (6.5–9 kg band).

Heat cycles · females

Stock data

First heat

8–12 mo

typical

Interval

180 d

typical

Bleeding

~9 d

typical

Proestrus 9d

Estrus 9d

Diestrus 52d

Anestrus 110d

General figures for dogs, not for this breed — individual cycles vary widely.

Questions people ask

Adult males usually weigh 5.9–7.7 kg and females 5.9–7.7 kg. Most are close to their full size by around 17 months, though the last little bit of filling out takes longer. Growth reference: Salt et al. 2017, WALTHAM (6.5–9 kg band).

No Parson Russell Terrier cycle figures are published here yet, so this is general guidance rather than a breed number: most females have a first season somewhere between six and fifteen months, and cycles then settle to roughly every 180 days. Smaller breeds tend to start earlier and larger ones later.

The median is 13.8 y. Median survival across 3,776 UK dogs (VetCompass, McMillan 2024) · half live 11–16 y. How the later years go comes down to weight, teeth, exercise and regular check-ups far more than to the breed.