Sulphur. The figures below are from Wikidata (CC0), with the page each one came from. More horse breedsSee the list Abaco Barb Colonial Spanish HorseThe Bahamas A Abaga Chinese MongolianPeople's Republic of China 1.4 cm Abeya BreedYemen 1.5 cm A Abstang BreedUnited States A Abtenauer BreedAustria Abyssinian horse PonyEthiopia 1.3 cm
