Old Blanchy was a friendly level 2 horse found in Westfall. Blanchy was the horse of Theodore and Verna Furlbrow. She was tired due to a lack of oats.
Finding oats for Old Blanchy was the goal of  Poor Old Blanchy.
Young Blanchy makes an appearance in Old Hillsbrad Foothills - A Caverns of Time instance.
Old Blanchy also appears at the Westfall Brigade Encampment in Northrend's Grizzly Hills, tended to by Captain Gryan Stoutmantle's squires.
Chris Metzen, when discussing the changes of Cataclysm in Westfall at BlizzCon 2009, jokingly said that "Old Blanchy is core."
This section concerns content exclusive to Cataclysm.
It turns out that Metzen's joke had more truth to it than was immediately apparent. Old Blanchy and the Furlbrows are killed by some thugs under command of a shadowy figure plotting her revenge against the kingdom of Stormwind. The murder is the impetus for bringing heroes to Westfall in Hero's Call: Westfall! and begins the Westfall storyline in Murder Was The Case That They Gave Me.