Jack Russells are frequently bought as a convenient small dog and frequently rehomed as an unmanageable one. The gap between those two things is entirely predictable if you know what the breed was for.
The job description
Bred to bolt foxes from underground: to go into a dark hole alone, face a cornered animal considerably better armed than they are, and not back down.
Every difficult trait follows directly:
- Fearlessness, including towards dogs ten times their size
- Independence. A dog working alone underground could not wait for instructions
- Persistence. Giving up was not useful
- High prey drive. Cats, squirrels, rabbits, small dogs, moving anything
- Digging
- Barking, bred in deliberately so the hunter could locate them
- Stamina out of all proportion to their size
None of this is a behaviour problem. It is the breed doing its job in a semi-detached house.
Exercise and mental work
Considerably more than people expect from a 6kg dog: an hour to ninety minutes a day, plus substantial mental work.
What suits them:
- Scentwork and searching. Excellent outlet, and calming as well as tiring
- A digging pit. A sandpit or a corner of loose soil, seeded with buried toys. Redirecting the behaviour works far better than suppressing it
- Flirt poles, which satisfy the chase drive under control
- Terrier-appropriate sports — agility, hoopers, earthdog where available
- Training sessions, daily. They are clever and they enjoy it
- Puzzle feeders and snuffle mats
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Snuffle Mat for Dogs
Ten minutes of searching does more for a terrier’s state of mind than an extra mile of walking. For a breed this driven, daily scent work should be routine rather than a wet-weather fallback.
What does not work: more running. A fit Jack Russell simply becomes a fitter Jack Russell.
Prey drive and recall
The honest position: many Jack Russells will never have a fully reliable recall in sight of prey. Selecting for a dog that pursues quarry relentlessly and ignores everything else does not produce a dog who comes back from a rabbit.
What to do about it:
- Train recall thoroughly anyway, with very high-value rewards
- Use a long line in open country with wildlife, permanently if necessary
- Teach a strong emergency recall, used rarely and paid enormously
- Accept the limitation rather than testing it
Dog Training Lead 30ft Long Line
A long line lets a terrier range and sniff safely in a field full of rabbit holes. There is no shame in a five-year-old dog on a line — there is a great deal of shame in a dead one on a road.
Cats and small pets. Some Jack Russells live happily with cats, particularly if raised with them. Many cannot be trusted with small furries at all. Be realistic before adding one to the household.
Dog-to-dog behaviour
Terriers were not bred to work in packs, and many are intolerant of other dogs — particularly same-sex — regardless of size difference.
- Socialise thoroughly and carefully from puppyhood
- Do not assume a small dog is safe in a dog park. A Jack Russell who starts a fight with a Rottweiler is the one who gets hurt
- Manage rather than hope. If your dog is dog-selective, arrange walks accordingly
Training
Clever, food-motivated and fast to learn — and equally fast to learn things you did not intend.
Priorities:
- Socialisation, intensively, before 16 weeks
- Impulse control, which does not come naturally
- A settle cue, because they do not switch off unprompted
- Recall and “leave it”, early and heavily reinforced
- An interrupter to break a stare or a chase before it starts
- Barking management — block the view, train a mat cue for the doorbell, and address the underlying arousal
Approach: short, high-energy sessions with excellent rewards. They get bored quickly and they are not biddable in the way a Labrador is. They work for you when it is worth their while.
Harsh handling produces a terrier who escalates rather than defers. They are not a breed that gives ground.
Health
Generally robust, and often long-lived — many reach fifteen or sixteen.
- Patellar luxation
- Legg-Calvé-Perthes disease, affecting the hip in young small-breed dogs
- Primary lens luxation — a painful eye condition that can cause glaucoma. There is a DNA test and it matters in this breed
- Deafness, associated with the piebald gene
- Ataxia and myelopathy, with DNA tests available
- Dental disease, as with all small breeds
- Injuries, because they have no sense of self-preservation. Jumping off furniture, going through gaps, and taking on larger dogs
Ask a breeder about primary lens luxation testing specifically.
Grooming
Three coat types — smooth, broken and rough.
- Smooth: a rubber curry mitt weekly. They shed considerably more than their size suggests
- Broken and rough: hand-stripping every few months to maintain the harsh coat, or clipping, which softens and fades it over time
- Nails every two to four weeks
- Teeth several times a week
Who they suit
Active people who find a busy, bold, opinionated dog entertaining. People who will do daily training and scentwork. People in rural or semi-rural settings, or urban owners willing to work hard at enrichment.
They do not suit households wanting a quiet lap dog, homes with small pets, people who are out all day, or anyone who assumes a small dog is a low-effort dog.
A well-exercised, well-occupied Jack Russell is one of the most entertaining dogs there is. An under-stimulated one will take the house apart, bark at everything, and dig up the garden — and will be entirely within their rights, because that is the job they were built for.
