Dog crossbreeds (sometimes called designer dogs) are dogs which have been crossbred or selectively bred from two or more recognized dog breeds. Generally considered a specific type of mixed-breed dog, dog crossbreeds are not recognised as breeds in their own right, and do not necessarily breed true. However, historic crossbreeding has led to established breeds, such as the Cesky Terrier.
Dog crossbreeds are combinations of lineages of the domestic dog; they are distinguished from canid hybrids, which are interspecific crosses between Canis species (wolves, coyotes, jackals, etc.).