Horde hunters can tame this Pack Mule the usual way, but it is friendly to Alliance and can only be tamed by Alliance hunters using the toy "N'lyeth, Sliver of N'Zoth" while in War Mode.
Level scaling: Most NPCs will scale with the Hunter's level, within the constraints of their level range. Hunters can tame regular NPCs up to 2 levels higher than them, but can only tame elite NPCs of the hunter's level or below.