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Breed guide · Popular AKC breed · Updated August 2026

Rat Terrier

American farm dog. Hardy, friendly, astonishingly long-lived. One of the healthiest breeds with the fewest hereditary problems.

Rat Terrier

Coat

short

Size

small · 10-25 lbs

Life expectancy

12-18 yrs

Activity

high

The breed

Where the Rat Terrier comes from, and what living with one actually asks of you.

Overview

About the Rat Terrier

The Rat Terrier is an American farm terrier developed for vermin control, all-purpose farm work, and practical companionship. It is small to medium, quick, alert, and tougher than its size suggests. The breed often appeals to people who want a lively, washable, trainable terrier without a heavy grooming burden.

Living with a Rat Terrier is usually busy and interactive. Many are affectionate, funny, athletic, and people-oriented, but they still have terrier prey drive and opinions. They can fit many homes if they get walks, play, training, digging or chasing outlets, and clear rules. A bored Rat Terrier may bark, chase, dig, or hunt household pests on its own schedule.

Health planning should be specific without exaggerating. Local data flags patellar luxation, hip dysplasia, Legg-Calve-Perthes disease, cardiac disease, allergies, and dental disease. The national club and veterinary sources discuss testing for hips, patellas, cardiac disease, Legg-Calve-Perthes, and related small-terrier concerns. Skin allergy can occur, but chronic itch should be worked up broadly rather than assumed to be food-driven.

Temperament

Living with a Rat Terrier

Rat Terriers are usually alert, cheerful, energetic, and affectionate. They can be good with children who respect boundaries and often enjoy other dogs, though prey drive around rodents, poultry, cats, and wildlife needs caution.

Training should be positive and fast-moving, with attention to recall, leash manners, quiet cues, and impulse control. They are clever enough to learn household patterns quickly, including ones owners did not intend to teach.

Daily care

Feeding, exercise, and coat — plus how the routine shifts from puppy to senior.

Nutrition

Feeding a Rat Terrier

American farm terrier. Calorie needs vary with size variety, age, neuter status, and activity. Remarkably healthy and long-lived breed.

Key nutrients

  • dental support
  • high-quality protein

Portion notes: Two meals daily. Adjust for size (wide range in this breed).

Exercise

Exercise & enrichment

Rat Terriers need daily walks, play, and problem-solving. Their needs vary by size and drive, so feed to body condition, age, neuter status, and activity rather than a fixed calorie number.

Brisk walksBarn huntEarthdog-style gamesAgility foundationsTrick trainingFetch with rules
Grooming

Grooming routine

Shedding · moderate

The short coat needs weekly brushing or wiping, plus nail trims, dental care, and ear checks. Small active terriers can wear nails unevenly and crack teeth on hard chews, so inspect feet and mouth routinely. Watch knees, hips, and skin if limping, skipping, or itching appears.

Life stages

The Rat Terrier through the years

Puppy

Rat Terrier puppies need socialization, recall games, safe prey-drive outlets, dental handling, and early rules around barking, digging, and chasing.

Adult

Adult Rat Terriers need regular exercise, measured meals, dental care, and monitoring for knee skipping, hip pain, itching, heart murmurs, or lameness.

Senior

Senior Rat Terriers benefit from dental planning, arthritis support, lower-impact games, weight control, and prompt evaluation of cough, limping, appetite shifts, or behavior changes.

Health

What Rat Terriers are prone to, the signs worth catching early, and what supports them.

Health

Health concerns to watch

patellar luxationhip dysplasiaLegg-Calvé-Perthes diseasecardiac diseaseallergiesdental disease

One of the longest-lived breeds (up to 18 years) with proper care.

Versatile size range (Miniature vs Standard).

Farm-bred prey drive means secure fencing is essential.

Generally very healthy with few breed-specific issues.

Is your Rat Terrier scratching?

Rat Terriers are prone to skin and allergy issues. Take our 2-minute itch triage quiz.

Start the quiz →
Supplements

Supplements for Rat Terriers

Matched to this breed's common health concerns. All NASC-sealed.

supplements

Cosequin (Nutramax)

The #1 vet-recommended joint supplement

  • #1 vet-recommended
  • NASC Quality Seal
  • Glucosamine + chondroitin
  • Clinically studied
See Cosequin (Nutramax)
supplements

Zesty Paws Allergy & Immune

Seasonal allergy + immune support chews

  • NASC Quality Seal
  • Seasonal allergy support
  • Salmon oil for skin
  • Chewable, dogs love them
See Zesty Paws Allergy & Immune

Supplements support — they don't treat or cure disease. Talk to your vet for anything clinical.

Gear & services

Food, gear, training, and what the first year with a Rat Terrier actually costs.

Fresh food

Fresh food picks for Rat Terriers

Our recommended fresh-food subscriptions for small dogs.

fresh food

The Farmer's Dog

Fresh, human-grade food portioned for your dog

  • Human-grade fresh food
  • Portioned per dog
  • Vet-developed recipes
  • 50% off first box
See The Farmer's Dog
fresh food

Ollie

Fresh food with both cooked and baked recipes

  • Fresh and baked recipes
  • Turkey, beef, lamb, chicken proteins
  • Custom portions
  • 60% off first box
See Ollie
fresh food

Nom Nom

Restaurant-quality fresh food with microbiome testing

  • Pre-portioned pouches
  • Vet-formulated
  • Microbiome testing available
  • 50% off first order
See Nom Nom
fresh food

Spot & Tango

Fresh or UnKibble — whole-food nutrition, your choice

  • Fresh or UnKibble options
  • Human-grade ingredients
  • Shelf-stable storage option
  • 50% off first order
See Spot & Tango
Ownership budget

What to budget for a Rat Terrier in year one.

A practical range for routine care and first-year setup. It assumes a dry or mixed diet and mostly at-home care; purchase and adoption fees are excluded.

Practical first-year range

$1,175-$3,325

A typical ongoing year runs $975-$2,025before optional services and unexpected medical care.

Food (year one)

Dry or mixed diet; fresh food can cost more

$450-$950

Gear & supplies (year one)

Crate, bed, harness, bowls, toys

$175-$400

Routine vet + preventatives

Wellness, vaccines, flea/tick and heartworm; no emergencies

$425-$725

Grooming

low needs; DIY to periodic professional help

$25-$150

Training

At-home work to group classes

$0-$600

Optional supplements

Not included in the headline totals

$0-$720

Other first-year

Microchip, license, spay/neuter if needed

$100-$500

Optional pet insurance

Not included above; premiums vary by age, ZIP and coverage.

$500-$1,150/yr

Also not included: fresh-food-only diets, boarding or day care, emergencies, and condition-specific treatment. Breed health risks are planning flags—not guaranteed annual bills.

Size-adjusted U.S. planning ranges, updated July 2026 and benchmarked against Rover's 2026 cost report and Synchrony's 2025 study. Actual costs vary by region and lifestyle.

Gear

Gear for Rat Terriers

Breed-size-appropriate picks. Links go to Amazon.

Training

Training for Rat Terriers

Matched to Rat Terrier temperament (friendly, lovable, inquisitive).

training

BAXTER & Bella

Online puppy training program, lifetime access

  • Lifetime membership
  • Self-paced video lessons
  • Puppy + adult content
  • Behavior troubleshooting
See BAXTER & Bella
training

GoodPup

1-on-1 virtual dog training with certified trainers

  • 1-on-1 live video sessions
  • Certified trainers
  • Custom per-dog plan
  • Weekly structure
See GoodPup
training

Dogo

App-based training with daily structure

  • App-based daily plans
  • AI-guided feedback
  • Affordable monthly cost
  • Trick training library
See Dogo
Trackers

GPS trackers for Rat Terriers

Size-appropriate picks for tracking, activity monitoring, and escape alerts.

gps tracker

Fi

Smart collar with GPS + activity tracking

  • Real-time GPS
  • Activity + sleep tracking
  • Escape alerts
  • 3-month battery
See Fi
gps tracker

Tractive

Affordable GPS tracker with unlimited range

  • Attaches to any collar
  • Worldwide GPS coverage
  • Activity monitoring
  • Budget-friendly
See Tractive
DNA

Curious about their DNA?

Confirm breed mix, check for genetic health risks, and get actionable insights.

dna

Embark

The most comprehensive dog DNA test

  • 350+ breeds identified
  • 250+ health conditions screened
  • Cornell-partnered science
  • Relatives finder
See Embark
dna

Wisdom Panel

Breed identification + health screening

  • 350+ breeds
  • Genetic health insights
  • Budget-friendly option
  • Fast results
See Wisdom Panel
Explore

More on the Rat Terrier

Similar-size breeds

Frequently asked

Rat Terrier questions, answered.

Are Rat Terriers good apartment dogs?+
They can be if barking, exercise, and terrier outlets are managed. Small size does not mean low drive.
Do Rat Terriers have high prey drive?+
Often yes. They were developed for vermin control, so small pets and wildlife need careful management.
What is Legg-Calve-Perthes disease?+
It is a hip disorder seen in small breeds that can cause pain and lameness. Limping should be evaluated.
Are Rat Terriers allergy-prone?+
Some have skin allergies. Persistent itch, ear inflammation, or paw licking deserves veterinary diagnosis.
What health testing should I ask about?+
Ask about patellas, hips, Legg-Calve-Perthes, cardiac exams, dental health, allergy history, and family longevity.
How long do Rat Terriers live?+
Rat Terriers typically live 12-18 years. Good nutrition, regular vet care, and weight management are the three biggest factors in reaching the top of that range.
How big do Rat Terriers get?+
Adult Rat Terriers typically weigh 10-25 lbs and stand 10-18 inches at the shoulder. That makes them a small breed.
How much exercise does a Rat Terrier need?+
Rat Terriers are a high-activity breed. Plan on 60-120 minutes of vigorous exercise per day. Mental stimulation (training, puzzle toys) matters as much as physical exercise.
What health problems do Rat Terriers commonly have?+
Rat Terriers are most prone to: patellar luxation, hip dysplasia, Legg-Calvé-Perthes disease, cardiac disease, allergies. Preventive vet visits, a quality diet, and weight management reduce risk on most of these. Reputable breeders screen for the genetic conditions.
Are Rat Terriers hard to groom?+
Rat Terriers need minimal grooming — weekly brushing and occasional baths are enough. Their short coat is low-maintenance day-to-day.
What should I feed a Rat Terrier?+
American farm terrier. Calorie needs vary with size variety, age, neuter status, and activity. Remarkably healthy and long-lived breed. Key nutrients to look for: dental support, high-quality protein.
Are Rat Terriers good for first-time owners?+
Rat Terriers are generally suitable for first-time owners with basic commitment. They're friendly, lovable, inquisitive. Plan for consistent training from day one.
Sources
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