Champion the Wonder Horse from Gene Autry's Flying A Productions, sung by Frankie Laine:

Champion the Wonder Horse! Champion the Wonder Horse!
Like a streak of lightnin' flash across the sky,
Like the swiftest arrow whizzin' from a bow,
Like a mighty cannonball he seems to fly,
You'll hear about him everwhere you go.
The time will come when everyone will know the name of
Champion the Wonder Horse! Champion the Wonder Horse!