Mixed Breed isn't a breed but a label for dogs whose ancestry combines two or more breeds, or is unknown. Adult weight usually runs from about 20 to 70 pounds, though some mixes are smaller and some much larger. Coats, ears and builds can come from any side of the family tree. Shedding is typically moderate, so a weekly brush goes a long way.
Because ancestry varies, the most useful clues are a dog's size, age, energy and how it handles people, other animals and new places. Research suggests breed explains only a small share of behavior, so a dog's own history and personality count for more than a guess at its mix. In Plano's heat, size and coat type are worth weighing, since heavy or thick-coated dogs need more help staying cool.