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Jack Russell Terrier
Energetic, fearless, clever
Also known as: jack russell, parson russell terrier, jrt
- Adult weight
- 6–8 kg
- Life expectancy
- 13–16 years
- Size
- Small
- Exercise
- Very high
- Origin
- UK
- Group
- Terrier
Reference update: · Not veterinary-reviewedCompare weight & lifespan with the American Kennel Club breed profile ↗
Health topics to discuss with your vet
- ●Primary lens luxationBreed-specific association not yet verified.
- ●Patellar luxationBreed-specific association not yet verified. General condition reference: OFA – Patellar luxation ↗
- ●Congenital deafnessBreed-specific association not yet verified.
- ●Spinocerebellar ataxiaBreed-specific association not yet verified.
Not a diagnosis or a complete risk list. A general condition reference explains a disease but does not establish increased risk in this breed or group. Unsourced associations still need verification.
Care tips
- ✓DNA test for lens luxation
- ✓Secure garden — strong prey drive
Calculators for your Jack Russell Terrier
Sources & review
Reference update 25 October 2026; not an independent veterinary review. Direct breed evidence is identified above. General directories below do not verify every listed health association.
- Official breed profile – Jack Russell Terrier ↗
- OFA – Patellar luxation ↗
- Fédération Cynologique Internationale (FCI) – Breed nomenclature ↗
- The Kennel Club (UK) – Breeds A to Z ↗
- American Kennel Club – Dog breeds ↗
- UFAW – Genetic welfare problems of companion animals ↗
- Orthopedic Foundation for Animals – Health screening ↗
Weight and lifespan are typical ranges for healthy adults from breed standards and veterinary references; individuals vary. Not veterinary advice.