Rat Terriers are typically small to medium in size. Adult males usually weigh between 10-25 pounds, while females generally weigh around 10-20 pounds. Their height usually ranges from 10-18 inches at the shoulder, with a compact and muscular build.

Rat Terriers are known for their playful, energetic, and intelligent temperament. They are friendly and social dogs that typically form strong bonds with their families. Their curiosity and high prey drive may lead them to chase smaller animals, so early socialization and training are important. They are typically alert and make good watchdogs, being keen observers of their surroundings.

The coat of the Rat Terrier is short, dense, and smooth, providing some protection against the elements. They come in various coat colors, including white, black, chocolate, blue, and tan, often with distinctive markings. Grooming needs are minimal; regular brushing helps to manage shedding and keep the coat healthy.

This breed thrives in active households where they can receive regular exercise and mental stimulation. Rat Terriers can adapt to various living situations, including apartments, as long as they have regular opportunities for exercise. They do best when included in family activities and require companionship, as they can become bored or anxious if left alone for extended periods.

Rat Terriers enjoy a variety of activities that engage their minds and bodies. Daily walks, playtime in the yard, and fetch games are essential for their physical health. They excel in dog sports such as agility, obedience, and barn hunt, which allow them to showcase their intelligence and agility. Providing mental challenges through puzzle toys and training exercises is also important for their overall well-being.