The episode was written and storyboarded by Kent Osborne and Somvilay Xayaphone, from a story by Merriwether Williams, Steve Little, Patrick McHale, Pendleton Ward, and Thurop Van Orman.

Eventually, after a night of attempting to get the horse to leave them alone, the two discover that it is actually the Ice King (voiced by Tom Kenny) in disguise; he is trying to learn the secret to being happy like Finn and Jake.

[2] The horse disguise that Ice King dons to spy on Finn and Jake was inspired by a fat Shetland pony web comic character, created by Kate Beaton.

"[12] Pierce particularly praised the episode's middle act—which features Finn and Jake trying desperately to get rid of the horse—writing that the sequence resembles "classic Warner Bros. cartoons of the past" and that the scenes illustrate "that [Adventure Time] works best when it mines the area where absurdism and physical humor meet.

"[12] Francis Rizzo III of DVD Talk wrote that the episode's premise was "so simple", but that "the way the horse is presented made his every on-screen appearance draw a laugh.