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Jack Russell Terrier Health: Common Issues and Costs in the UK

Jack Russell Terriers are spirited, hardy dogs with a reputation for toughness and longevity. While generally one of the healthier small breeds, Jack Russells do have a few hereditary conditions worth knowing about, and their active lifestyle makes accidents and injuries more common than in calmer breeds.

Primary Lens Luxation (PLL)

Primary Lens Luxation (PLL) is a serious hereditary eye condition strongly associated with terrier breeds, including Jack Russells. The lens of the eye becomes detached from its normal position due to degeneration of the supporting ligaments (zonules), and can fall forwards or backwards within the eye. If the lens falls forwards, it can block fluid drainage and cause glaucoma — a painful, vision-threatening condition.

PLL typically develops between three and eight years of age. Signs include a cloudy or blue-tinged eye, redness, tearing, and pain. It is a genuine emergency when it causes secondary glaucoma; emergency referral to a veterinary ophthalmologist may be needed. Lens removal surgery costs approximately £1,000–£2,500 per eye.

A DNA test for PLL is available, and all Jack Russell breeders should test. Dogs with two copies of the mutation (affected) develop PLL; those with one copy (carrier) are at low risk but should not be bred to other carriers. Ask for PLL DNA certificates when buying a puppy.

Patellar Luxation

Patellar luxation — where the kneecap slips out of its normal groove — is common in small terrier breeds including Jack Russells. It varies in severity from Grade 1 (occasional slipping, no lameness) to Grade 4 (permanent luxation, significant lameness). Most Jack Russells with mild patellar luxation manage well without surgery.

Signs include intermittent skipping or hopping on the affected hind leg, followed by a normal gait once the kneecap pops back in. Many Grade 1 and 2 cases require only monitoring and weight management. Grade 3 and 4 cases, or those causing pain and lameness, may benefit from surgical correction, costing approximately £800–£1,800 per leg.

Keeping your Jack Russell at a healthy weight significantly reduces the strain on the stifle joint and can delay or prevent the need for surgery in mild cases.

Congenital Deafness

Congenital deafness is seen in Jack Russell Terriers, particularly in dogs with predominantly white coat colouring. As with other predominantly white breeds (Dalmatians, Bull Terriers), the pigmentation gene that causes white colouring is linked to a defect in the development of the inner ear's hair cells. Bilateral (both ears) or unilateral (one ear) deafness may result.

BRAEM testing (Brainstem Auditory Evoked Response) is used to diagnose deafness in dogs and involves measuring electrical brain responses to sound. This costs approximately £100–£200 at an approved testing centre. Responsible breeders of predominantly white Jack Russells should BAER test puppies before sale.

Unilaterally deaf dogs can live a normal life with appropriate management — they should be kept on a lead when near traffic, and owners need to be aware of their limitations. Bilaterally deaf dogs require more specialised training and management.

Injuries and Accidents

Jack Russells' fearless, high-energy nature means they are at above-average risk of injuries. They are keen diggers, can get into tight spaces, and will take on animals much larger than themselves. Common injuries include cuts and lacerations, bite wounds, and fractures from falls or road traffic accidents.

Because of their small size, fractures in Jack Russells can be complex and costly — orthopedic repair of a small limb fracture may cost £1,000–£3,000 depending on severity. Bite wounds from encounters with other animals may require surgical debridement and drainage, costing £200–£800.

Pet insurance is practical for Jack Russells specifically because of injury risk. Emergency out-of-hours consultations average £275.72 in the UK, and accidents can happen any time. Knowing your nearest [emergency and out-of-hours vet](/emergency-out-of-hours-vets/) before you need it is important.

Routine Health Costs for Jack Russells

Jack Russell Terriers are among the most cost-effective dogs to keep healthy, partly because of their small size and general hardiness. Annual routine costs include vaccinations (booster ~£65), parasite prevention (£80–£150), and standard consultations (£40–£65). Pet insurance typically costs £8–£18 per month for a Jack Russell.

The breed's longevity — Jack Russells commonly live to 15 or even older — means owners have many years of health care to plan for. [Compare vet prices near you](/compare-vet-prices/) to ensure you're not overpaying for routine care over what may be a very long relationship with your vet.

Find a Vet Near You

Jack Russell Terriers are robust little dogs that benefit from a good regular vet relationship. Use CompareMyVet to find and compare practices near you. Visit [app.comparemyvet.uk](https://app.comparemyvet.uk) to search vets in your area.