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) dog. These characteristics develop from a breeder's desire to create a distinct 'look' (or "style") within their line. Breeders create their own "style" within their line, being careful not to stray from "breed type". Health problems of dog breeds and objections to dog showing have been covered extensively in the following articles: Purebred dogs | Genetic disease | Criticism of dog showing | Dog | Dog breeding | List of dog diseases | Canine reproduction | Inbreeding | Founder effect. Also see articles about individual breeds for more on health issues of individual breeds. Breed type (dog) Breed type in