A og hybrid is the offspring of parents of two different purebred dog breeds, more commonly called a crossbreed or crossbred in animal breeding. Crossbreeding (parents of two different purebred breeds) results in offspring that tend to be stronger and healthier than either parent, an effect called hybrid vigour. Many dog crossbreds (hybrids) have been given fanciful or portmanteau names, as in Labradoodle (purebred Labrador Retriever crossed with purebred Poodle.) Further generations of crossbreds bred to crossbreds lose the advantage of hybrid vigour, although they may still be called by the hybrid name, and may eventually be recognized as a separate purebred dog breed.