Fox Kit

Source
This item has an extremely low (0.1%) chance to drop from Baradin Foxes on Tol Barad Peninsula. It can also be bought for from the Baradin's Wardens and Hellscream's Reach quartermasters.

Pet Journal
The fighting in Tol Barad has made it difficult to find these kits, and numerous would-be owners have decimated the fox population there as a result.