suitable to training by humans) to a greater degree than others. In other cases, horses of different body types were cross bred until a desired characteristic was achieved and bred true. Written and oral histories of various animals or pedigrees of certain types of horse have been kept throughout history, though breed registry stud books trace back to about the 13th century, at least in Europe, when pedigrees were tracked in writing, and the practice of declaring a type of horse to be a breed or a purebred became more widespread. Certain horse breeds, such as the Andalusian horse and the Arabian horse, are claimed by aficionados of the respective breeds to be ancient, near-pure descendants from an ancient wild prototype, though mapping of the horse genome as well as the mtDNA and y-DNA of various breeds has largely disproved such claims. Purebred cats A cat whose ancestry is formally registered is called a pedigreed or purebred cat. Technically, a purebred cat is one whose ancestry contains only individuals of the same breed. A pedigreed cat is one whose ancestry is recorded, but may have ancestors of different breeds. The list of cat breeds is quite large: most cat registries actually recognize between 30 and 40 breeds of cats, and several more are in development, with one or more new breeds being recognized each year on average, having distinct features and heritage. Owners and breeders compete in cat shows to see whose animal bears the closest resemblance (best conformance) to an idealized definition, based on breed type and the breed standard for each breed. Because of common crossbreeding in populated areas, many cats are simply identified as belonging to the mixed types of domestic long-haired and domestic short-haired cat, depending on their type of fur. Some original cat breeds that have a distinct phenotype that is the main type occurring naturally as the dominant domesticated cat type in their region of origin are sometimes considered subspecies and in the past received names as such, although this is no longer supported by feline biologists. with F. silvestris the wild cat and F. s. catus the domestic. Some of these cat breeds (with their invalid scientific names for historical interest) are: F. catus anura - the Manx F. catus siamensis - the Siamese F. catus cartusenensis - the Chartreux F. catus angorensis - the Turkish Angora Purebred livestock Most domesticated farm animals