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Wire Fox Terrier, dog breed

Wire Fox TerrierCharacteristics, history, training and care

Wire Fox Terrier, dog breed

Wire Fox Terrier. · State Farm / Wikimedia Commons, CC BY 2.0. Cropped and resized.

The Wire Fox Terrier is a small English terrier, mainly white, with a wiry coat and V-shaped ears. The FCI standard describes it as alert, quick, with a keen expression, “on the tiptoe of expectation”, friendly, forthcoming and fearless. Wikipedia says it resembles the Smooth Fox Terrier, but the two are thought to have developed separately.

Quick facts

Common name Wire Fox Terrier
Scientific name Canis lupus familiaris
Country of origin United Kingdom (England)
Official recognition FCI, definitively since 13 May 1955 (group 3, terriers; standard no. 169); also recognised by the AKC
Lifespan 12–15 years, according to the AKC
Size (males) no more than 39 cm at the withers; ideally 8.25 kg
Size (females) slightly smaller
Coat type Dense, very wiry, with a soft undercoat
Common colours Mainly white, with black, black and tan, or tan markings
Energy level High
Suited to an apartment? Yes, with plenty of exercise
Temperament Alert, lively, friendly, forthcoming, fearless
Tendency to aggression Low towards people
Good with children Very good, according to the AKC
Good with other animals Moderate; prey drive
Genetic predispositions Heart disease, luxating patella

History and origin

Wikipedia says the breed comes from England and that, although it resembles the Smooth Fox Terrier, the two are thought to have developed separately. The AKC says it was originally bred for hunting, to bolt game from its earth.

Wikipedia adds that it has won the top award at the Westminster show more times than any other breed (15 in all). Its popularity soared after “The Thin Man” films, in which the Charles family's dog, Asta, was a Wire Fox Terrier.

How the breed developed

  • Origins – A hunting terrier in England.
  • 13 May 1955 – The FCI recognises the breed.
  • Today – The breed with the most Best in Show titles at Westminster.

Breed rating

Feature Stars
Training and intelligence ★★★★☆
Easy to train ★★★★★
Intelligence ★★★★★
Independence ★★★★☆
Stubbornness ★★★★★
Behaviour and temperament ★★★☆☆
Affectionate with family ★★★★☆
Friendly with children ★★★★☆
Good with other dogs ★★★★☆
Good with cats and other animals ★★★★☆
Loyalty ★★★★☆
Tendency to be aggressive ★★☆☆☆
Tendency to bark ★★★★☆
Needs and care ★★★★☆
Shedding ★★★★☆
Needs frequent grooming ★★★★☆
Activity and lifestyle ★★★★☆
Energy level ★★★★☆
Daily exercise needs ★★★★☆
Suited to apartment life ★★★★☆
Health and longevity ★★★★★
Life expectancy ★★★★☆
Predisposition to genetic diseases ★☆☆☆☆
Working abilities and uses ★★★★☆
Good companion dog ★★★★☆
Good companion dog ★★★☆☆

Indicative rating: 5 stars means the highest level. It is based on the ratings the American Kennel Club gives the breed and on the FCI standard.

Physical characteristics

The standard describes it as active and lively, with bone and strength “in a small compass”, never cloddy. The AKC describes it as “7–8 kg of coiled-spring energy”, a sturdy, symmetrical hunter with a short back and round, dark eyes that sparkle with fire and intelligence.

General appearance

The coat is dense and very wiry, from 2 cm on the shoulders to 4 cm on the withers, back, ribs and quarters, with a shorter, softer undercoat. The hair on the jaws is crisp and fairly long, to give the muzzle a strong look.

Feature Wire Fox Terrier
Size Small
Height at the withers no more than 39 cm
Weight ideally 8.25 kg (males)
Coat Wiry
Colour White with patches
Type Terrier

White predominates, with black, black and tan, or tan markings. Brindle, red, liver or slate-blue markings are not desirable.

Training and socialisation

The standard describes it as alert, quick, friendly, forthcoming and fearless. The AKC says training calls for consistency, patience and a good sense of humour: it is very clever but independent and gets bored quickly, so lessons must be fun. It responds well to positive methods and shuts down if treated harshly.

The AKC warns that it should never be let off the lead, because once it catches the scent of an animal, it forgets all its training.

Tips for effective training

  • Do not let it off the lead. It forgets its training when it scents game.
  • Make lessons fun. It gets bored quickly.
  • Be positive. It shuts down under harshness.
  • Keep your sense of humour. The AKC says plenty of humour is needed.

Activity needs and lifestyle

The AKC says that, like most terriers, it needs plenty of exercise: long walks, chasing a tennis ball in the yard or play in a large, well-fenced area.

Activity How often Why it matters
Long walks daily Fitness
Ball games daily Energy
Search games several times a week Terrier instinct

Tips for a balanced life

  • Always keep it on a lead.
  • The fence must be secure.
  • Strip or clip the coat regularly.

Care and health

Coat and skin care

The AKC says grooming depends on what you want: show dogs must be hand-stripped regularly, by the owner or a specialist, while pet dogs can be machine-clipped into a similar shape with much less effort.

Common health problems

The AKC says the breed is generally healthy, but the following can occur:

Condition Description Common symptoms
Heart disease Conditions of the heart Tiredness, coughing
Patellar luxation The kneecap slips out of place Suddenly holds a hind leg up for a few steps, then uses it again

Other care

  • Ask for the parents' health tests.
  • Brush its teeth regularly.
  • Go for yearly check-ups.

Diet and nutrition

The AKC recommends good-quality food suited to the dog's age, and attention to its weight.

Tips for a healthy diet

The table gives a starting estimate, calculated with the formula from the Merck Veterinary Manual. The first two calorie columns show the calories per day for a healthy adult dog. The last column shows what this means in dry food with 3,500–4,000 kcal per kilogram.

Dog's weight Calories per day (neutered) Calories per day (not neutered) Dry food per day (approximate)
7 kg 480 kcal 540 kcal 120–150 g
7.7 kg 520 kcal 580 kcal 130–170 g
8.5 kg 560 kcal 630 kcal 140–180 g
  • Treats count towards the daily portion.
  • Split the food into two meals a day.
  • A dog is at the right weight when you can feel its ribs under the coat without pressing hard.

Foods to avoid

Some human foods are dangerous for dogs: chocolate, coffee, grapes and raisins, onions, garlic, xylitol (a sweetener used in chewing gum), macadamia nuts and alcohol.

Reproduction and development

Physical and emotional maturity

In dogs, sexual maturity usually comes between 6 and 12 months. Small breeds become adults faster than large ones, usually at around one year.

Mating and pregnancy

Pregnancy lasts about 63 days, counted from ovulation. Mating a female on her first heat is not recommended. The FCI standard requires that only healthy dogs of typical breed appearance are used for breeding.

Caring for the puppies

In small breeds, a litter has 3–4 puppies on average. The puppies are very small and fragile in the first weeks, so they must be kept warm and handled with care. Socialisation starts early: gentle handling, everyday noises and new people.

Interesting facts

  • Tintin's Snowy. The dog in the comic books is a Wire Fox Terrier.
  • Asta from “The Thin Man”. The film greatly boosted its popularity.
  • The Westminster record. The most Best in Show titles.
  • Coiled-spring energy. That is how the AKC describes it.
  • Always on the tiptoe of expectation. The phrase comes from the standard.

Snowy (Milou) from “The Adventures of Tintin”

Wikipedia says Snowy, Tintin's dog, is a Wire Fox Terrier.

Asta from “The Thin Man”

Wikipedia says Asta, the Charles family's dog in “The Thin Man” film series, was a Wire Fox Terrier.

Frequently asked questions

What breed is Tintin's Snowy?

A Wire Fox Terrier.

Is it good with children?

Yes; the AKC gives it the top score.

How do you care for the coat?

By hand-stripping or machine clipping.

How long does it live?

The AKC gives 12–15 years.