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

Splintered Tusk

NPC	Level	Zone	Chance
Mottled Boar	1 - 2	Durotar	48.9%
Small Crag Boar	3	Dun Morogh	48.6%
Thistle Boar	2 - 3	Teldrassil	48.6%
Young Thistle Boar	1 - 2	Teldrassil	48.4%
Bristleback Battleboar	4 - 5	Mulgore	47.7%
Battleboar	3 - 4	Mulgore	47.4%