A cockapoo is a hybrid breed of dog that is a cross between a cocker spaniel and a poodle. Developed in the 1960s in the US, they have become popular due to their hypoallergenic coat, affectionate nature, and intelligence. Cockapoos vary in size and appearance depending on the poodle used in crossbreeding. They are known for loyalty, playfulness, and adaptability, making them popular among families and individuals.