sentences:  Many grade horses are the result of unintentional or accidental breedings, though in some cases, they are the result of a planned breeding of a stallion and a mare, but animals who themselves are of uncertain bloodlines.Experienced horsepeople can usually spot a breed type in most grade horses.Some grade horses may have at least partially known breeding, but may not have been registered by their breeder, particularly if the product of an unintended mating, or may have been sold without papers.