The Jack Russell Terrier is not a breed recognised by the Kennel Club but they are a very popular small dog with pet owners. The Jack Russell is typically intelligent and tenacious, playful and fun-loving. They are quick to learn, good escape artists, and love to dig in the garden. Their love of digging comes from their origins as ratters who will catch and kill their prey. They are wonderful little character dogs and full of joy, but can be a bit barky and assertive. They moult a lot so would not suit an owner who is house proud or who likes a quiet life. He needs an owner who will play with him and give him plenty of exercise every day. Jack Russells are generally healthy and long lived, but are prone to obesity and owners should avoid over feeding.
Inbreeding coefficient (COI)
(should be as low as possible)
Jack Russells have a mixed genetic inheritance and will have a COI lower than 6%
Health and welfare problems due to conformation
(body shape and physical characteristics)
BVA/KC Health Schemes http://www.bva.co.uk/chs
- Eye disease: Primary lens luxation (PLL) (annual testing); Progressive retinal atrophy (PRA) (annual testing) (progressive loss of vision)
DNA tests available
- Primary lens luxation (PLL)
- Late Onset Ataxia (LOA) (progressive brain disease causing wobbliness)
Unofficial (breed club) schemes
Ask the breeder to show you the certificates for the above tests/screening for both parents. If any of the above tests have not been considered necessary by the breeder (and there may be good reasons), ask her to explain why.
Other diseases reported
(for which there are currently no genetic or screening tests for sire or dam)
- Deafness (in some white JRs)
- Ataxia (progressive disease of the brain causing inco-ordination and falling over)
- Myaesthenia (muscle disease causing weakness)
- Legg-Calve-Perthes disease (diseased femoral head causing hind limb lameness)
- Patellar luxation (displaced kneecap)
- Von Willebrand’s disease (a blood clotting disorder)
- Portosystemic shunt (abnormality of the blood circulation system, resulting in blood by-passing the liver)
- Immunodeficiency syndrome (causing recurrent infections)
Note that all of these diseases are uncommon.