Why Do Americans Say Neigh To Horsemeat? Pope Gregory Banned It In 732

 The odds are against Americans roasting horsemeat is really a survivor of European cultural bias.
Horsemeat is as nutritious and tasty as beefsteak, and is sometimes pawned off as such in cheap restaurants in France. Ancient people from Mongolia to northern Europe ate horseflesh. And in modern times it has been served in Paris cafes during the 1870 siege of the Paris Commune.

Harvard's Faculty Club served it during World War II. Frederick Simoons cites "familiarity with an animal as a common rationale for a taboo."
America's prejudice against horseflesh has little to do with the cowboy mentality or with the animals' usefulness. Pope Gregory III, realizing that horse-eating was a feature of the pagan Germans' religious rites, ordered the meat banned from Christian tables.

With North America's vast pastures, horses might well have been raised for food throughout our history and our cowboys might have followed the Mongolian horsemen's example of eating their mounts once they had died. But cultural bias, once set, proved too strong. Today, with the bias enforced by a thousand Western movies, we are as likely to start eating horses as we are to start eating cats and dogs.