Poodle crossbreed the words "Labradoodle" (poodle−Labrador retriever cross), "Poochon" (Bichon Frise-Poodle cross) and "cockapoo" (poodle−cocker spaniel cross) are now listed in the "Oxford English Dictionary". There were over 220 hybrid designer dogs recognized by the American Canine Hybrid Club in 2006 and now, including various poodle crossbreeds. Legitimate breed associations, such as the AKC, the UKC, and the CKC, do not recognize this crossbreed, or any other designer cross, as a breed in its own right. However, some major kennel clubs do accept registration of crossbreed and mixed-breed dogs for performance events such as agility and obedience. There is another registry, the
Dog crossbreed the purebred breeds, while retaining their more appealing traits. Jon Mooallem in "The New York Times" writes, "Given the roughly 350 inherited disorders littering the dog genome, crossing two purebreds and expanding their gene pools can be 'a phenomenally good idea,' according to one canine geneticist—if it is done conscientiously." Crossbreeding has not been well studied in dogs, although it has been for livestock. The heritability of the desired trait being bred for (such as a hypoallergenic coat) needs to be known; "Heritability is the proportion of the measurable difference observed between animals for a given trait that is due