Horace Horsecollar is an animated character created by Ub Iwerks and Walt Disney. He is one of Mickey Mouse's best friends. Horace first appeared as Mickey's plough horse in the 1929 cartoon "The Plowboy". Characterized as a cheerful know-it-all, Horace helped Mickey on his sleuthing expeditions in the comics before Goofy assumed that role. In recent years, Horace has more commonly appeared in Mickey Mouse Works and House of Mouse.