Breed comparison
Jack Russell Terrier vs Rat Terrier
Jack Russells and Rat Terriers look similar but come from different countries and have different temperaments. Honest side-by-side.
Jack Russell Terrier
Full breed guide →
Rat Terrier
Full breed guide →Quick answer
Jack Russells and Rat Terriers look similar but come from different countries and have meaningfully different temperaments. JRTs are intense, high-drive English fox-hunters needing 90+ minutes of vigorous daily exercise. Rat Terriers are American farm dogs with a calmer off-switch — athletic but easier to live with at home. Pick a Rat Terrier for similar appearance with broader family fit; pick a Jack Russell only if you're prepared for true working-terrier intensity.
These two breeds get confused often — both are small to medium short-coated terriers, both have black-and-white or tricolor markings, both were bred to hunt vermin. The Jack Russell was developed in 19th-century England specifically for fox hunting; the Rat Terrier is an American farm dog mix from the late 1800s. The differences come down to intensity, family-friendliness, and prey drive — and they're meaningful.
Snapshot comparison
Trait
Jack Russell Terrier
Rat Terrier
Size
10–15 inches at the shoulder
10–18 inches at the shoulder
Weight
13–17 lbs
10–25 lbs
Lifespan
13–16 years
12–18 years
Energy
Very high
High
Grooming
Low — weekly brushing
Very low — weekly brushing
Best for
Best with active households
Excellent — versatile family farm dog
Temperament
Jack Russell Terrier
Intense, fearless, opinionated. Classic working terrier — needs a job or invents one.
Rat Terrier
Alert and athletic but notably calmer at home. Rat Terriers have an off switch most JRTs don't develop.
The verdict: Rat Terriers are easier to live with day-to-day; Jack Russells are more intense.
Exercise
Jack Russell Terrier
90+ minutes daily plus mental work.
Rat Terrier
60–90 minutes daily. Slightly lower ceiling than JRTs.
The verdict: Both are athletes. JRTs are more demanding; Rat Terriers slightly easier.
Grooming
Jack Russell Terrier
Low — weekly brushing on smooth coats.
Rat Terrier
Very low — weekly brushing.
The verdict: Both are easy to groom.
Training
Jack Russell Terrier
Smart, food-motivated, easily bored. Recall is hard due to extreme prey drive.
Rat Terrier
Smart and slightly more biddable. Sensitive to corrections.
The verdict: Rat Terriers are typically easier to train; both have strong prey drive that complicates recall.
Health
Jack Russell Terrier
Patella, lens luxation, deafness, Legg-Calvé-Perthes. Long-lived (13–16 years).
Rat Terrier
Patella, allergies, primary lens luxation. Very long-lived (12–18 years).
The verdict: Both are healthy long-lived breeds. Rat Terriers are slightly less prone to deafness.
Family fit
Jack Russell Terrier
Best with very active families and older kids.
Rat Terrier
Excellent — versatile family dog comfortable in busier households.
The verdict: Rat Terriers are more family-flexible; Jack Russells need the right home.
Which one should you pick?
Pick the Jack Russell Terrier
Pick a Jack Russell Terrier if you want intensity, drive, and a true working dog — and you can give it the exercise, training, and job it needs.
Pick the Rat Terrier
Pick a Rat Terrier if you want a similar look and athletic build but with a calmer temperament, easier training, and broader family fit.
Frequently asked questions
Are Jack Russells and Rat Terriers the same breed?
No. Jack Russells were developed in 19th-century England by Reverend John Russell for fox hunting. Rat Terriers were developed in the United States from a wider mix of working breeds — English Fell Terriers, Smooth Fox Terriers, plus likely Whippet and Beagle for speed and tracking. They look similar but have separate origins and standards.
What's the temperament difference?
Rat Terriers are calmer at home and have a working off switch most Jack Russells don't develop. JRTs are more intense, more drive, more vocal, and require more handling experience. Both are smart and athletic.
Which is better for first-time owners?
Rat Terriers, clearly. Their easier temperament, more biddable training, and lower-intensity prey drive make them dramatically more forgiving for first-time dog owners. JRTs are not a first-time breed.
Which is bigger?
Rat Terriers come in two sizes — Mini (10–13 inches) and Standard (13–18 inches). Jack Russells (Russell Terriers per AKC) are 10–12 inches. A Standard Rat Terrier is meaningfully bigger than a JRT; a Mini Rat is similar size.
Which lives longer?
Rat Terriers are among the longest-lived breeds, with many reaching 16–18 years. Jack Russells are also notably long-lived at 13–16 years. Both benefit from staying lean and active.