Jack Russell Terrier vs. Miniature Fox Terrier: A Comparison

TerrierOwner.com is reader-supported. If you buy a product through a link on our site, we may earn an affiliate commission at no additional cost to you.

The Jack Russell Terrier and the Miniature Fox Terrier may seem like interchangeable small terriers at first glance. Although they are similar, when you look closer, these two breeds have some notable differences in their history, appearance, personality, and care requirements.

So if you’re trying to decide between a Jack Russell or a Mini Fox for your next canine companion, this head-to-head guide will help highlight the key similarities and differences.

The Jack Russell Terrier originated in England in the 19th century as a hunting dog bred to chase foxes. The Miniature Fox Terrier was later developed in Australia in the 20th century to hunt rodents and other small vermin on farms.

While they share some ancestry, these two terriers have diverged into distinct breeds with unique traits. This article will explore their origins, physical attributes, temperaments, exercise needs, health concerns, and suitability for families.

Whether you live in an apartment or a large house with kids, are an experienced or first-time dog owner, or just love terriers, this comparison will help shed light on which of these energetic breeds might be the best fit for you.

Jack Russell Terrier vs. Miniature Fox Terrier: A Comparison

History and Origins

The Jack Russell Terrier was developed in southern England during the mid-to-late 1800s. The breed traces its roots back to a small terrier named Trump, who was owned by a hunting enthusiast named Reverend John Russell.

Reverend Russell desired a terrier that could keep up with fox hounds and chase foxes into their dens during hunts. Through selective breeding over several generations, the Parson Russell Terrier, later renamed the Jack Russell Terrier, was established as a distinct breed.

These dogs were prized by hunters for their energetic nature, speed, courage, and compact muscular build that allowed them to scramble into fox dens during the hunt. Their tenacious personality and hunting spirit remain hallmarks of the breed today.

The Miniature Fox Terrier, as the name suggests, is a smaller relative of the Smooth Fox Terrier. The breed originated in Australia in the early 20th century.

Like Jack Russells, Mini Fox Terriers were bred as hunting dogs, but were used on farms to control rats, rabbits, and other vermin. Their smaller size enabled them to pursue quarry into burrows and tunnels.

In addition to their hunting skills, Mini Fox Terriers became popular as companion dogs, eventually being recognized as a distinct breed by major kennel clubs in the late 1990s.

While the Jack Russell and Mini Fox Terrier have some shared ancestry, selective breeding in England versus Australia for different hunting purposes has led to the distinct breeds we know today.


In terms of their physical attributes, there are some noticeable differences between Jack Russell Terriers and Mini Fox Terriers.

Jack Russells typically stand about 10-15 inches tall at the shoulder and weigh 14-18 pounds. They have a balanced, athletic build with their height about equal to their length.

These dogs normally have a dense, rough coat that is primarily white with brown, black, and/or tan markings. Their coat can be smooth or broken-haired as well. Their expression is alert and intelligent.

Jack Russell Terrier walking through a field.
Jack Russell Terrier

Miniature Fox Terriers are smaller, growing to 9.5-12 inches tall at the shoulder and weighing just 7-12 pounds. They have a square-shaped build, with their height about equal to their length.

Their coat is short, smooth, and predominantly white with black and/or tan markings. Their head is more domed than a Jack Russell’s, and their expression conveys curiosity and energy.

Mini Fox Terrier laying in the grass.
Miniature Fox Terrier

The Jack Russell Terrier’s larger bone structure and weather-resistant coat allowed it to thrive chasing foxes in different terrain and conditions. The Miniature Fox Terrier’s smaller size helped it pursue rodents and vermin into burrows and tight spaces.

While their coats and builds suit their original hunting purposes, both terriers have athletic, flexible bodies that make them very agile and speedy dogs. Their compact sizes also mean they can thrive in small homes or apartments.

Temperament and Personality

While these terriers share some spirited personality traits, there are also some notable differences between Jack Russells and Mini Fox Terriers when it comes to temperament.

Jack Russell Terriers are highly energetic, tenacious, and assertive dogs originally bred to bay foxes during the hunt. They are very active and require a lot of vigorous exercise and mental stimulation.

Jack Russells are intelligent but can have a stubborn streak during training. They tend to be aloof with strangers but are affectionate and loyal with their families. They can be prone to mischief and challenging behavior without proper outlet for their energy.

In contrast, Miniature Fox Terriers have a friendly, upbeat temperament. They are also energetic dogs that need plenty of exercise, but they are not quite as intense as Jack Russell Terriers.

Mini Fox Terriers can still exhibit some willful behaviors during training but overall are more eager to please and less domineering than Jack Russells. Mini Fox Terriers generally get along well with new people and other pets when properly socialized.

Both breeds can make excellent companions for active owners who can provide them with consistent training, activity, and outlets for their energy.

However, Mini Fox Terriers may be the better choice for novice owners or families with young children given their more easygoing nature compared to the tenacious Jack Russell.

Exercise and Maintenance Needs

Jack Russell Terriers and Miniature Fox Terriers are both very energetic breeds that require significant daily exercise. However, Jack Russells typically need a bit more physical and mental stimulation.

Jack Russells were bred to run and hunt all day. They thrive on vigorous exercise like running, hiking, and interactive play like fetch.

Around 30-60 minutes of active exercise split into multiple sessions per day is ideal. Jack Russell Terriers also appreciate having a securely fenced yard where they can play and burn energy.

Miniature Fox Terriers have strong exercise needs as well, but may be satisfied with slightly less than a Jack Russell. Mini Fox Terriers enjoy long walks, jogs, interactive toys and games, and agility activities. Usually 30-45 minutes of daily exercise meets their needs. A fenced yard is also a good outlet.

Mini Fox Terrier laying in the grass with a tennis ball. Miniature Fox Terriers have strong exercise needs as well, but may be satisfied with slightly less than a Jack Russell.
Miniature Fox Terriers have strong exercise needs as well, but may be satisfied with slightly less than a Jack Russell.

In terms of grooming, Miniature Fox Terriers are lower maintenance thanks to their short, smooth coat. Weekly brushing and occasional bathing is all they require.

Jack Russells need more regular brushing, especially if they have a rough coat. Their longer coats also means they are not as naturally neat and clean as the shorter-haired Mini Fox Terrier.

Both breeds shed moderately year-round. Their small size makes them good choices for apartment dwellers, but regular activity is a must regardless of living space.

In general, Jack Russells require a bit more in terms of exercise and grooming needs compared to Mini Fox Terriers.

Health and Lifespan

Jack Russell Terriers and Miniature Fox Terriers are generally healthy breeds, but can be prone to some similar conditions.

For both breeds, patellar luxation is a common orthopedic issue to be aware of. This involves the kneecap becoming dislocated from the groove of the femur bone, which can cause lameness in the hind legs.

Lens luxation, which is the dislocation of the lens in the eye, can also affect both Jack Russells and Mini Fox Terriers and predispose them to glaucoma. Congenital deafness is another potential concern for both breeds.

In addition, Jack Russells are prone to a disorder called Legg–Calvé–Perthes disease in which the femur bone degenerates due to a lack of blood supply.

Miniature Fox Terriers can be more susceptible to epilepsy and some heart conditions compared to other breeds.

Jack Russell Terrier sitting in the grass. With proper care and routine vet exams, Jack Russell Terriers typically live 13-16 years.
Jack Russell Terriers live up to 16 years

With proper care and routine vet exams, Jack Russell Terriers typically live 13-16 years while Miniature Fox Terriers often reach 14-15 years.

Keeping dogs active, managing weight, and doing recommended health screening helps maximize their lifespan.

Family Suitability

When it comes to selecting either a Jack Russell or Mini Fox Terrier for a family companion, there are some important considerations regarding children, other pets, activity level, and space requirements.

Jack Russell Terriers can make good family dogs, but may be better suited for homes with older children given the breed’s high energy. Their larger size also makes them a bit more durable for rambunctious play.

They generally get along fine with other pets if socialized early but can have a tendency towards dog aggression. Jack Russells require a medium to large yard to expend their energy.

Miniature Fox Terriers are a better choice for families with younger children since their smaller size makes them more fragile. They also have slightly lower exercise needs than Jack Russells, making them better suited for smaller homes.

Mini Fox Terriers tend to get along well with other household pets. Early socialization is still advised.

Ultimately, the Miniature Fox Terrier may be the more easygoing choice for first-time owners or families with very young kids or limited space. However, an active family willing to provide adequate exercise and training can thrive with either energetic breed.

Jack Russell vs. Mini Fox Terrier Takeaway

In the choice between a Jack Russell Terrier and a Miniature Fox Terrier, there are some key similarities and differences to keep in mind:

  • Both breeds are energetic small terriers requiring significant daily exercise and mental stimulation. However, the Jack Russell usually has higher exercise needs.
  • Miniature Fox Terriers tend to have a more easygoing temperament and be less domineering in nature than the tenacious Jack Russell.
  • Jack Russells come in rough-coated varieties that require more intensive grooming compared to the smooth Mini Fox Terrier.
  • While both breeds can adapt well to apartment living thanks to their small size, Jack Russells ideally need access to a yard to help expend energy.
  • Miniature Fox Terriers may be better suited to homes with very young children given their smaller size, while Jack Russells are more durable for rough play.
  • Jack Russells can be prone to dog aggression, while Mini Fox Terriers tend to readily get along with other pets.

Determining which breed is better suited for an individual or family often comes down to energy level, space limitations, experience with terriers, and presence of small children or other pets in the home. Both can make wonderful companions for the right owners.

Josh Martin- Founder and Creator of Terrier Owner

Josh Martin is the proud owner of a female Jack Russell Terrier Named Luna. Josh founded TerrierOwner.com to share the stories of owning a Terrier and to help all terrier owners with the struggles, excitement and common questions that come with being a new terrier parent.

Recent Posts