Items, NPCs, quests, objects and spells of patch 1.12.1, read live from the realm itself.

Large Hoof

NPC	Level	Zone	Chance
Shadow Charger Elite	20 - 21	Shadowfang Keep	60.9%
Fel Steed Elite	19 - 20	Shadowfang Keep	40.4%
Shadowhorn Stag	22 - 23	Ashenvale	22.7%
Antlered Courser	22 - 23	Stonetalon Mountains	16.8%
Great Courser	24 - 25	Stonetalon Mountains	16.6%