A mixed breed is a domesticated animal descended from multiple breeds of the same species, often breeding without any human intervention, recordkeeping, or selective breeding. Examples include: * Mixed-breed dog, a dog whose ancestry is complex or not known * Grade horse, a horse whose parentage is unknown, unidentifiable, or of significantly mixed breeding * A domestic short-haired cat or domestic long-haired cat of no particular breed, colloquially called a "moggy" or "moggie" in some dialects