Andalusian horse
A few breeds, such as the Thoroughbred, acknowledge Arabian ancestry with named, documented horses in their stud books, but no longer accept new infusions of Arabian blood and the breed is considered a purebred in its own right. Literally hundreds of other horse breeds have some evidence of Arabian influence. In some breeds, such as the Percheron, Arabian influence is considered highly probable, but dates back hundreds of years and thus is difficult to conclusively prove as pedigree records cannot be linked to individual animals. In other breeds, such as the Andalusian horse or the American Quarter Horse, documentation of Arabian bloodlines in the breed can be found but either the records are controversial, or the infusion of Arab blood itself was controversial and for various reasons the breed registry today seeks to downplay Arabian type or influence.