Rez og (short for Reservation dog) is a term used to refer to any number of loose (usually stray) dogs roaming the Indian Reservations of the mid-western and southwestern United States. These animals often carry mange and fleas. They can not be identified as any one breed; many appear to be a mix of Labrador Retriever, German shepherd, Sighthound, or northern breed (see this website for examples ). Occasionally, wolf and coyote hybrids can occur as well. They are often exceptional hunters and, when taken into a home, can be very good watchdogs.