Competitors are not allowed to use black hoof polish on white hooves. Cattle are large quadrupedal ungulate mammals with cloven hooves. They possess curving horns, large bat wings, and cloven hooves for feet. Favorite horses, donkeys, and salukis had their hooves, paws, and tails hennaed. They are always shown with cloven hooves. They can easily digest bones, hooves and horns. The reindeer has large feet with crescent-shaped, cloven hooves for walking in snow or swamps. Two creatures with antlers, hooves and tails are bound to his round pedestal. Mephistopheles is costumed here as a Junker and with cloven hooves. Keratin is a structural protein mainly found in hair, nails, hooves, horns, quills. White markings are seen in the hooves and the inner lower forelegs. The mane was full, with broad hooves and curly hair. The integumentary system includes hair, scales, feathers, hooves, and nails. It is hardy with clean legs and sound hooves. However, by diving under the hooves of Morgarath's steed, Horace manages to dismount him.