Most of the Army’s horses, donkeys and mules, are being donated “to align more resources with warfighting capability.” ...

In 1894, 13 horses were used to produce the miracle drug of their day, diphtheria antitoxin. ... Long Ago Against Diphtheria, the Heroes Were Horses. Staff Writer. The Gainesville Sun.

Long Ago Against Diphtheria, the Heroes Were Horses HOWARD MARKEL, M.D. The Claremont Riding Academy, on the Upper West Side of Manhattan, shut its doors for good a few months ago.