Dark Iron Core Hound

You don't get dogs hotter than this.

Riding Requirements:

This mount is available to all eligible characters on your account.
Level 10
Apprentice Riding
Alliance only

Source:

Achievement: Allied Races: Dark Iron Dwarf
Dark Iron Core Hound. Requires Dark Iron Dwarf character.

Notes:

This slender, one-headed core hound is the racial mount of the the Dark Iron Dwarf allied race. After unlocking the Dark Iron Dwarves by recruiting them to the Alliance, this mount is usable by all Alliance players on your account. To begin the unlocking process, you must reach Exalted with the Battle for Azeroth Alliance faction 7th Legion. Wowhead also has a useful Dark Iron Dwarves Allied Race Guide.

Introduced in:

Patch 8.0

Travel Mode:

Ground (+60% or +100% speed)

Speed depends on your riding skill.

More info on Wowhead:

Dark Iron Core Hound