Grey Mastiff

Grey Mastiff
Can Be Tamed by Worgen Only Mountain Mastiff7GilneasAccompanies watchmen around Tempest's Reach. Becomes friendly (and untameable) after you defeat the rebels and rescue Greymane.
Can Be Tamed by Worgen Only Wary Mastiff10Stormglen Village, Keel Harbor, Gilneas
Can Be Tamed Gilnean Hound13-14Ruins of GilneasFound in the Northern Headlands and Northgate Woods.
Can Be Tamed Snuffles27 RareNorthfold Manor, Arathi HighlandsIn a small shed.
Can Be Tamed Dragonflayer Hunting Hound68Howling FjordNifflevar
Can Be Tamed by Horde Only Mastiff <Alliance Guard's Pet>100Archmage Overwatch, AshranFriendly to Alliance.

Cannot Be Tamed Baron <Huntsman Blake's Pet>3GilneasFriendly.
Cannot Be Tamed Gilnean Mastiff5GilneasFriendly.
Cannot Be Tamed Gilnean Mastiff5-6Gilneas
Cannot Be Tamed Attack Mastiff6 SpawnedGilneasNot a beast. Summoned during fight against Dark Ranger Thyala.
Cannot Be Tamed Rabid Mastiff6Shadowfang KeepInvalid target.
Cannot Be Tamed Gilnean Mastiff12-13GilneasFriendly.
Cannot Be Tamed Tracking Hound100-110Greywatch, StormheimFriendly to both factions.