The Rat Terrier presents a compact, muscular silhouette that conveys athleticism, alertness, and the capability to perform the hunting and ratting work for which the breed was developed. Despite their relatively small stature, these terriers project strength and substance, appearing neither frail nor coarse. The overall impression combines elegance with functionality, showcasing a dog bred for practical purposes rather than purely aesthetic considerations.
Size varies between the two recognized varieties, with Standard Rat Terriers measuring 13 to 18 inches at the shoulder and Miniature Rat Terriers ranging from 10 to 13 inches. Weight is proportionate to height, typically falling between 10 and 25 pounds for most individuals. Proper body condition shows well-defined musculature without excessive fat or gauntness. The breed should appear fit and capable of sustained activity.
The body follows slightly rectangular proportions, with length from point of shoulder to point of buttocks just slightly exceeding height at the withers. This moderate length provides the flexibility needed for quick turns and the pursuit of small prey through confined spaces. The back is level and strong, supporting powerful movement. Ribs are well sprung, creating a moderately wide chest that provides adequate lung capacity without excessive breadth that would impede movement.
The head forms a smooth, blunt wedge shape when viewed from front or profile, with no exaggeration in any feature. The skull is broad and slightly domed, tapering toward the muzzle, which is well filled under the eyes and chiseled clean. The powerful jaws are hinged well back, allowing the dog to open its mouth wide enough to catch and dispatch rats and other rodents effectively. The nose is black in darker-coated dogs, with self-colored noses acceptable in dilute colors.
Eyes are oval shaped, somewhat small, and set obliquely, contributing to the alert, intelligent expression characteristic of the breed. Eye color ranges from light to dark and corresponds to coat color, with gray eyes acceptable only in blue or blue fawn dogs. The expression should convey intelligence, alertness, and lively interest in surroundings. Set wide apart, the eyes enhance peripheral vision useful for detecting prey movement.
Ears may be erect, semi-erect, tipped, or button, with all carriage types equally acceptable provided both ears match. V-shaped ears are set at the outside edges of the skull. The variety of acceptable ear carriage reflects the breed's diverse ancestry and the historical emphasis on function over uniform appearance. Cropped ears are specifically disqualified under the AKC standard.
The neck is clean, moderately long, and slightly arched, blending smoothly into well-laid shoulders. The muscular neck allows quick head movement essential for catching prey. Front legs are straight and strong, with elbows close to the body. Compact feet with well-arched toes and tough pads support the active lifestyle these terriers enjoy.
The tail may be naturally short, naturally long, or docked at the second or third joint. Natural tails are carried in a slight curve upward when the dog is alert. The variety of acceptable tail presentations again reflects the breed's practical heritage and the historical acceptance of natural variation among working farm dogs.
Coat characteristics include short, smooth, dense hair that lies close to the body and displays a natural sheen indicating health. The single coat lacks the dense undercoat found in many breeds, making maintenance straightforward. Color patterns include virtually any pied pattern, combining white with one or more additional colors. Common colors include black, tan, chocolate, blue, apricot, lemon, red, and various combinations thereof with white.
Affection Level
★★★★★
The Rat Terrier forms exceptionally strong bonds with family members, craving physical closeness and emotional connection. These devoted dogs often follow their favorite person from room to room and love nothing more than cuddling on the couch or warming laps.
Good With Children
★★★★☆
When raised with children, Rat Terriers become playful, cheerful companions who enjoy active games and outdoor adventures. They do best with older children who understand appropriate handling, as rough treatment may trigger typical terrier responses.
Good With Other Dogs
★★★☆☆
Rat Terriers generally coexist well with other dogs, especially when properly introduced and socialized early. However, some may attempt to establish dominance regardless of size differences, displaying typical terrier confidence that requires appropriate management.
Shedding Level
★★★☆☆
The Rat Terrier sheds moderately year-round with seasonal increases during spring and fall coat changes. Regular brushing minimizes loose hair around the home, and the short coat makes cleanup relatively manageable compared to longer-coated breeds.
Grooming Needs
★★☆☆☆
This breed's short, smooth coat requires minimal grooming maintenance. Weekly brushing removes loose hair and distributes natural oils, while occasional baths keep the coat clean. Basic nail, ear, and dental care complete the simple grooming routine.
Drooling Level
★☆☆☆☆
Rat Terriers are not prone to drooling, maintaining clean, dry mouths under normal circumstances. This trait makes them ideal companions for those who prefer a neat household without the moisture associated with heavy-jowled breeds.
Coat Length
★☆☆☆☆
The coat is short, smooth, and shiny, lying close to the body. This sleek covering requires minimal maintenance while providing adequate protection from the elements. The single coat lacks the undercoat that causes heavy shedding in double-coated breeds.
Openness To Strangers
★★★☆☆
Rat Terriers typically greet strangers with curiosity rather than immediate friendliness or hostility. Proper socialization develops confidence around new people, though some individuals may remain reserved until they assess visitors as non-threatening.
Playfulness
★★★★★
These terriers maintain their playful spirit well into maturity, always ready for games, adventures, and interactive fun with their families. Their enthusiasm for play makes them entertaining companions who bring energy and joy to daily life.
Protective Nature
★★★☆☆
The Rat Terrier serves as an alert watchdog, announcing visitors and unusual activities with characteristic barking. While not aggressive, they take their guardian duties seriously and will position themselves between family members and perceived threats.
Trainability
★★★★☆
Intelligent and eager to please, Rat Terriers respond excellently to positive training methods. They learn quickly and retain lessons well, though occasional terrier stubbornness requires patient handlers who maintain consistency without harsh corrections.
Energy Level
★★★★☆
These active terriers possess considerable energy that requires daily outlet through exercise, play, and mental stimulation. While they can settle nicely indoors, they need regular opportunities to run, explore, and engage in activities that satisfy their active nature.