Pet Advisor Blog

Decker Giant Rat Terrier – Dog Breed Guide

Breed summary

Size: Medium
Weight: Can exceed 35 pounds
Height: Can exceed 23 inches
Longevity: 18
Bark Tendency: High
Aggression: Low
Compatibility to other pets: Medium

Adopt a Decker Giant Rat Terrier, Dog Breed Guide


Among all Rat Terrier varieties, the Decker Giant Rat Terrier is considered by some as the biggest. These dogs are also the youngest variety of the Rat Terrier dogs. They are not officially recognized by the United Kennel Club.

Official Name

Decker Giant Rat Terrier
Other Name:
Decker Feist
Giant American Rat Terrier
Decker Rat Terrier


Date –
Country – United States
Family / Group – Terrier

Recognized By

America’s Pet Registry, Inc.
Continental Kennel Club
National Kennel Club
Universal Kennel Club International
National Rat Terrier Registry
American Canine Registry
Rat Terrier Club International
Rat Terrier Breeders Association
American Canine Registry
Dog Registry of America, Inc.
North American Purebred Registry, Inc.
American Kennel Club – Foundation Stock Service Program


Not all Ratter Terrier breeders and canine associations see eye-to-eye when it comes to recognizing the Decker Giant Rat Terrier dog breed. One thing is for sure; they are the largest variety and share all traits and behavior of a typical Rat Terrier dog. See the Rat Terrier Dog Breed Guide to learn more about this breed’s history.


Decker Giant Rat Terriers are very similar to the smaller varieties of this breed when it comes to temperament. Decker Rat Terriers are also intelligent, curious and very active dogs. They are natural hunting dogs that will display impressive gameness and tenacity while on the field. These dogs will be affectionate and affable when at home with family. All in all, Decker Rat Terriers dogs are docile dogs that will be friendly towards everyone including children, other dog breeds and even cats!

Bred For

The Decker Rat Terrier variety were specifically bred to be larger Rat Terriers. These dogs are bred and used as multipurpose working dogs, hunting dogs, ratters and also as companion pets.


Decker Rat Terriers in general will be good apartment dogs provided their owners sufficiently satisfy their activity requirements. The Decker Giant Rat Terriers will be suited in rural areas where there is enough space to move about.


All the varieties of the Rat Terrier dog breed are very easy to groom and will require minimal attention in doing so.


Decker Giant Rat Terriers are very easy to train as these dogs will always be eager to please their master and very quick in learning new lessons.


The various varieties of Rat Terriers are known to be at high risk on developing hip and elbow dysplasia and luxating patellas. These dogs are also at high risk on acquiring mange and allergies. They are dogs that are common to have under or over bites.


All the varieties of Rat Terriers require a pretty good amount of activity to satisfy their energy needs. Rat terrier dogs should be taken on long walks or jogging every day. Owners are advised to devote at least 30 minutes every day to exercise their dogs. Rat terriers will love outdoor activities and challenging games that will test their mental and physically strengths.