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Rat Terrier vs. Jack Russell Terrier: Which Breed Is Right for You?

These terriers each bring something different to the table.

by Katie Koschalk, | February 3, 2026

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Rat Terrier vs. Jack Russell Terrier: Which Breed Is Right for You?

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So, you’re looking to adopt a small dog and have it narrowed down to a Rat Terrier or a Jack Russell Terrier. At first glance, these two breeds may seem similar in appearance and personality. They’re both small, adorable, and high-energy.

Rat Terrier vs. Jack Russell: breed origins and history

These breeds’ histories play a significant role in how they behave today. Here’s the origin of each breed.

Rat Terrier history

Rat Terriers originated in the U.S. in the late 1800s and early 1900s, where they were developed by American farmers primarily for rodent control. To create the perfect farm helper, breeders mixed different types of terriers (such as Fox Terriers, Manchester Terriers, and Bull Terriers) with Beagles for their great noses and Whippets for extra speed.

This breeding produced a high-energy farm dog skilled at pest control, hunting, and property guarding.

Today, Rat Terriers still have those strong working instincts, but they’re just as loved for being affectionate, loyal, and adaptable companions in homes.

Jack Russell Terrier history

The Jack Russell Terrier traces their roots back to mid-19th century England and the work of Reverend John “Jack” Russell, who gave the breed their name. His goal was to develop a small, fearless dog who could “go to ground,” meaning they could chase foxes into their dens and flush them out during hunts.

Through selective breeding, he created a little powerhouse with fierce intensity, energy, and relentless prey drive.

Jack Russell Terriers arrived in the U.S. in the 1930s and quickly gained popularity as hunting dogs and family companions.

Tired jack russell terrier dog sleeps on the couch

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Rat Terrier vs. Jack Russell Terrier: physical differences

Rat Terriers and Jack Russell Terriers look quite similar, but several key features make them easy to tell apart once you know what to look for.

Size: Rat Terriers can be miniature or standard size, weighing 10 to 25 pounds. Jack Russell Terriers are generally smaller and more consistently sized, typically weighing nine to 15 pounds.
Build: Jack Russells are muscular and sturdy with an athletic build. Rat Terriers look a bit leaner and have longer legs.
Height: Rat Terriers are generally taller, measuring 10 to 18 inches. Jack Russells are usually 10 to 12 inches tall.
Ears: Rat Terriers have upright or tipped ears, while Jack Russell ears fold forward.
Coat: Both breeds have short coats, but Jack Russells may have smooth, broken, or rough coats. Rat Terriers have a sleek, smooth coat only.
Color: Jack Russells are predominantly white with tan, black, or brown markings. Rat Terriers can be all white, or bi- or tri-colored, with white and other colors, including black, blue, fawn, tan, red, chocolate, and more.

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Rat Terrier vs. Jack Russell: temperament and personality differences

Rat Terriers and Jack Russell Terriers share terrier traits: big personalities, sharp minds, and a strong prey drive. But their temperaments still differ in notable ways.

Energy level and exercise needs

Jack Russells are the opposite of couch potatoes. These lively dogs are extremely energetic and constantly ready for activity. They need about one-and-a-half to two hours of exercise daily. They thrive with active pet parents who often hike, bike, or take long walks.

Rat Terriers are energetic, too, but require a bit less exercise — about 30 to 60 minutes daily. Once a Rat Terrier’s exercise needs are met, they tend to settle a bit more easily indoors than Jack Russells.

Intensity and adaptability

Jack Russells are usually the more intense, driven terrier, while Rat Terriers balance energy with calm. Jack Russells do best in homes with frequent activity and varied enrichment. Rat Terriers also need activity and enrichment, but tend to be more adaptable companions.

Trainability

Both breeds are smart, quick learners. However, Jack Russells are often more independent and stubborn, which can make training challenging. Rat Terriers tend to be more eager to please, making training smoother.

Both breeds can get along well with other dogs and typically do well with children who are old enough to safely interact with a small, energetic dog.

Prey drive and instincts

Jack Russells were bred for intense, fast-paced hunting, which gives them very strong prey drives. Rat Terriers can also have strong instincts to chase small animals, but it’s often less pronounced, and their overall behavior is generally less intense.

Because they have strong prey drives, both breeds may chase cats. Peaceful coexistence is more likely if they’re introduced carefully at a young age and socialized properly.

Why You Should Consider Adopting a Jack Russell Terrier Mix

These mixes come in small and large sizes, often boasting loving and alert personalities.

Rat Terrier vs. Jack Russell: health differences

Both Rat Terriers and Jack Russell Terriers are generally healthy breeds with long lifespans. Rat Terriers typically live around 12 to 18 years, while Jack Russells usually live about 12 to 14 years.

Rat Terrier and Jack Russell health issues

Despite being overall healthy dogs, both breeds are susceptible to the same genetic health conditions, including:

Patellar luxation
Hip dysplasia
Congenital deafness
Legg-Calvé-Perthes disease
Heart disease
Skin and food allergies
Dental disease

Should you adopt a Rat Terrier or a Jack Russell Terrier?

Choosing between a Rat Terrier and a Jack Russell Terrier comes down to your lifestyle, energy level, and what you want day-to-day life with a dog to look like.

If you’re very active, love outdoor adventures, and want a bold, high-drive dog who’s always ready to go, a Jack Russell Terrier may be the better fit. If you’re looking for a playful, energetic dog with a terrier personality, but a bit more balance and flexibility, a Rat Terrier may be a great match. With the right home and commitment, both breeds can be loving, loyal companions.

You may also find Rat Terrier or Jack Russell mixes in shelters and rescues, which can combine traits from these terriers with characteristics of other breeds.

Whichever pup you choose, providing exercise, training, routine, and love will help them be the happiest, healthiest version of themselves.

Where to adopt a Rat Terrier or Jack Russell Terrier

If you’re ready to welcome a Rat Terrier or Jack Russell Terrier into your home, adoption is a wonderful way to give a dog a fresh start while helping reduce the strain on overcrowded shelters and rescues. Here’s where to look.

Local animal shelters

A great place to begin your search is at your local animal shelter or humane society. Rat Terriers, Jack Russell Terriers, and their mixes sometimes find their way into shelters through no fault of their own.

Many arrive because their previous families faced unexpected changes in housing, finances, health, or time and could no longer care for them. Others come in as strays who were never reclaimed.

Breed-focused rescues

You can also look into breed-specific rescues that specialize in Rat Terriers, Jack Russell Terriers, or terrier-type dogs. These groups tend to focus on helping surrendered dogs or those pulled from overcrowded shelters.

Most operate through foster homes, which give dogs a chance to decompress in a home setting and allow rescuers and foster parents to learn more about their personalities and behavior.

All-breed rescue organizations

General dog rescues are another place to look. Although they aren’t dedicated to one breed, many regularly take in terriers and terrier mixes and may already have a Rat Terrier, Jack Russell, or similar dog available for adoption.

Pet adoption websites

Adopt a Pet makes the search process even easier by allowing you to browse adoptable Rat Terriers, Jack Russells, and mixes from shelters, rescues, and individual homes across the country.

You can narrow your search by age, location, gender, color, and if a dog is good with kids or other pets. These filters make it easier to quickly search a wider area and find a dog who matches your lifestyle and home.

Commonly asked questions

What are the differences between a Jack Russell and a terrier?

“Terrier” is a group of breeds. A Jack Russell is one specific terrier breed known for intense energy and strong prey drive. Other terriers vary widely in build, temperament, and activity needs.

What are the cons of a Rat Terrier?

Rat Terriers can have a strong prey drive and need plenty of exercise and mental stimulation. Without enough activity, they may become restless or destructive.

What are the cons of a Jack Russel Terrier?

Jack Russell Terriers are even more energetic than Rat Terriers, and need lots of daily exercise and mental stimulation, which can be challenging for some people. They can be stubborn, have a strong prey drive, and can become destructive if bored.

Do Rat Terriers and Jack Russell Terriers bark a lot?

Both breeds can be vocal, especially if bored, under-stimulated, or reacting to noises or movement. Training, mental enrichment, and regular exercise can help reduce excessive barking.

Resources

“History of the Jack Russell Terrier.” The Real Jack Russell, www.therealjackrussell.com/breed/history.php.

“Rat Terrier.” Ancestry.com, 2025, petdna.ancestry.com/dog-breed-list/rat-terrier.

“Rat Terrier Dog Breed Information.” American Kennel Club, www.akc.org/dog-breeds/rat-terrier.

“Russell Terrier.” American Kennel Club, www.akc.org/dog-breeds/russell-terrier.

Katie Koschalk

Katie Koschalk is a freelance writer based in Northern California. Fusing her love and knowledge of animals with her journalism degree and years of professional writing, Katie is dedicated to improving the lives of pets and their caretakers by sharing helpful and accurate information. When she’s not at her desk, you can find her exploring trails with her Aussie, Hunter, cooking plant-based meals, and talking to her two cats, Jax and Sadie, in really ridiculous voices.