Prairie dog and Clark in 1804. Lewis described it in more detail in 1806, calling it the "barking squirrel". On average, these stout-bodied rodents will grow to be between long, including the short tail, and weigh between . Sexual dimorphism in body mass in the prairie dog varies 105 to 136% between the sexes. Among the species, black-tailed prairie dogs tend to be the least sexually dimorphic, and white-tailed prairie dogs tend to be the most sexually dimorphic. Sexual dimorphism peaks during weaning, when the females lose weight and the males start eating more, and is at its lowest when the females
Breed type (dog) English Mastiff standard cautions, "Judges should also beware of putting a premium on showiness." "Breed type" usually takes into account the work the original dog type from which the breed was developed was bred to do. In order to counterbalance the overuse of appearance in awarding championships, some major registries and breed clubs have instituted performance events as part of the awards at conformation shows. Dog type, "breed type", dog breed, and purebred dog breed are at times all used interchangeably, but they all have distinct meanings. "Types of dogs" are varieties developed for a specific work; they may be