Jack Russell Terrier: Size, Lifespan, Health and Care
Quick answer
PDSA, the UK veterinary charity, puts the Jack Russell Terrier at about 25-30 cm tall and 4-6 kg, living over 10 years. It suggests at least 1 hour a day, and lists 5 health problems to watch, including luxating patellas and primary lens luxation. Minimum running cost: at least £50 a month after buying and setting up, and over £8,900 over a lifetime.
From PDSA, the UK veterinary charity. Not veterinary advice. Worried about your own pet? See who to call.
On this page (7 sections)
Key facts
| Size | Small |
|---|---|
| Average height | 25-30 cm |
| Average weight | 4-6 kg |
| Average lifespan | Over 10 years |
| Exercise | At least 1 hour a day, split into a couple of walks plus off-lead time in a secure area |
| Grooming | A weekly brush for short coats; rough coats may need hand stripping; sheds more in spring and autumn |
| Cost | At least £50 a month after buying and setting up, and over £8,900 over a lifetime |
Source: PDSA, Jack Russell Terrier breed information.
Health problems to watch
PDSA lists these for the breed. A higher risk does not mean every animal will be affected; where a screening scheme or test exists, ask the breeder for the parents' results.
- luxating patellas (slipping kneecaps)
- primary lens luxation
- late onset ataxia
- spinocerebellar ataxia
- Legg-Perthes disease
Source: PDSA, Jack Russell Terrier breed information.
Exercise and grooming
PDSA suggests at least 1 hour a day, split into a couple of walks plus off-lead time in a secure area. Grooming: a weekly brush for short coats; rough coats may need hand stripping; sheds more in spring and autumn. Source: PDSA, Jack Russell Terrier breed information.
Temperament
PDSA describes the breed as lively, confident, loyal and clever; excitable, barks readily and has a high prey drive. PDSA says they can develop separation anxiety, should not be left alone for more than four hours, may suit older children better, and need a secure garden as they dig and squeeze through gaps. Source: PDSA, Jack Russell Terrier breed information.
Cost
PDSA's figure: at least £50 a month after buying and setting up, and over £8,900 over a lifetime. These are minimums that leave out buying the animal and vet bills for illness or injury. More: annual cost of owning a dog and puppy first-year costs. Source: PDSA, Jack Russell Terrier breed information.
Questions people ask
How long do Jack Russell Terriers live?
PDSA gives an average lifespan of over 10 years.
How much exercise does a Jack Russell Terrier need?
PDSA suggests at least 1 hour a day, split into a couple of walks plus off-lead time in a secure area.
What health problems do Jack Russell Terriers have?
PDSA lists luxating patellas (slipping kneecaps); primary lens luxation; late onset ataxia; spinocerebellar ataxia; Legg-Perthes disease.
How much does a Jack Russell Terrier cost?
PDSA's estimate: at least £50 a month after buying and setting up, and over £8,900 over a lifetime.
Sources
- PDSA, Jack Russell Terrier breed information, read 7 November 2026.
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