What is a Mixed-breed Dog?

A mixed-breed dog is a cross between two or more dogs of different breeds. A mixed-breed dog’s heritage can vary in complexity from the most simple first generation cross-breed mix of two puppies to outbred dogs that live in freely interbreeding populations in the wild.



Example of a Simple Mixed-breed Dog



Example of a Complex Mixed-breed Dog

Mixed-breed dogs can vary greatly in size, shape and color and are often difficult to classify physically. In fact, visual identification, even by professionals, is only accurate about 25% of the time. Check out these fascinating findings from a visual identification study conducted by Julie K. Levy, DVM, PhD, Diplomate ACVIM, Director, Maddie’s® Shelter Medicine Program at the University of Florida.