What breed of horse was Mister Ed?

"Mister Ed" is an American television sitcom that aired from January 1961 to February 1966.

The Mister Ed show concept was derived from a series of short stories by children's author Walter R. Brooks which began with "The Talking Horse".

The show in effect had two leads operating as a comedy team. The title role of Mister Ed, a talking palomino, was played by gelding Bamboo Harvester (1949–1970) and voiced by former Western film actor Allan Lane. And the role of Ed's owner, a happy go lucky but somewhat klutzy architect named Wilbur Post, played by Alan Young (November 19, 1919 – May 19, 2016).

Many of the program's gags arise from Mister Ed's tendency to talk only to Wilbur, his mysteriously well cultured personality, his rapscallion tendencies, and his precociously human-like behavior that far exceeds anything those around Wilbur expect of a horse. A running gag is other characters hearing Wilbur talking to Ed and asking to whom he is talking. Another running gag centers on Wilbur being accident-prone and inadvertently causing harm to himself and others.

Mister Ed's ability to talk was never explained and rarely contemplated on the show. In the first episode, when Wilbur expresses an inability to understand the situation, Mister Ed offers the show's only remark on the subject: "Don't try. It's bigger than both of us!"