Mexican prairie dog of prairie dogs and associated species, such as shorebirds and birds of prey. Pronatura Noreste, as of February 2007, has signed conservation easements with "ejidos" and private owners for the protection of more than 42,000 acres (170 km) of Mexican prairie dog grasslands. Mexican prairie dog The Mexican prairie dog ("Cynomys mexicanus") is a diurnal burrowing rodent native to Mexico. Treatment as an agricultural pest has led to its status as an endangered species. They are closely related to squirrels, chipmunks, and marmots. "Cynomys mexicanus" originated about 230,000 years ago from a peripherally isolated population of the more widespread "Cynomys
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