Mister Ed
That was 'Trigger'.
Smartest Guy in Town - 2007 TV was released on: USA: 2007 (Los Angeles, California)
Battle of the Child Geniuses Who Is the Smartest Kid in America - 2000 TV was released on: USA: 9 May 2000
Smartest Girl in Town - 1936 is rated/received certificates of: USA:Approved (PCA #2576) USA:TV-G (TV rating)
Trigger (Roy Roger's horse) was a Tennessee walker
Roy Roger's horse's name was "Trigger" and Dale Evan's horse was called "Buttermilk"
The Horse Handler Snowy the Wild Horse of the Tinderry Ranges - 2001 TV is rated/received certificates of: Australia:G
Mr.Ed was the horse's screen name.
his horse name is tornado
Dark Horse - 2012 TV was released on: USA: 2012
On animal planet they have a TV special on horses and a horse show on National geographic.
A Horse for Danny - 1995 TV is rated/received certificates of: Australia:PG