Once a Fire Horse, Always a Fire Horse
Here is a nice article about an old fire horse and a milk wagon (from LAFD Historical Archive via Firefighter).
One day, my father bought "Old Frank." He wasn't our first horse to pull the milk wagon, but he was the best. We purchased him shortly before World War I from the Hannibal Fire Department.Why we called him "Old Frank" I've never known, but it was likely because the horse-drawn fire-fighting rigs in those days required young horses with speed, strength, stamina and intelligence, and Frank had apparently gotten too old for that job.
He was 9 years old when we got him. He had a teammate, "Fox," who was purchased for the milk wagon operated by our friendly competitor, Bross and Bier Dairy. Both were Percherons, and both had been through the training school for "fire horses."
Be sure to read the whole article. Fire horses and milk wagons make for an interesting combination!

