A mutt is a dog that is a mix of different breeds, rather than belonging to a specific breed. This genetic diversity often results in unique physical characteristics and temperaments. Mutts can vary widely in size, color, and behavior, making each one distinct. They are often found in shelters and are popular choices for adoption due to their friendly nature and resilience. Many people believe that mutts tend to be healthier than purebred dogs because they have a broader gene pool, which can reduce the risk of inherited health issues. Organizations like the American Kennel Club recognize the value of mutts, promoting their adoption and celebrating their individuality.