A "mixed breed" in animals is defined as animals that have a genetic background from two or more breeds. This definition emphasizes the variety of genetic influences that contribute to the physical and behavioral traits of a mixed breed animal. Unlike purebreds, which come from a single breed lineage and have well-documented ancestry, mixed breeds are often the result of natural breeding processes or the deliberate combination of different breeds.
The distinct characteristics and unpredictable qualities of mixed breeds can arise from the diverse genetics inherited from their parent breeds. This genetic diversity can lead to variations in size, temperament, coat type, and other physical attributes. Mixed breeds can provide greater genetic variation, which may contribute positively to factors like health and adaptability when compared to purebreds that may be more susceptible to breed-specific health issues due to limited genetic diversity.
Other definitions do not accurately capture the essence of what constitutes a mixed breed. Animals with a single breed lineage would not qualify as mixed breeds, and those that are selectively bred for specific traits are usually designated within specific breeds rather than mixed. Lastly, animals that are purebreds but registered incorrectly still maintain a single breed lineage and do not have the genetic influence of multiple breeds, which is central to the concept of mixed breed status.