This was the first HD full screen episode of American Dad.
While at the horse whisper's inner office, pictures of his "equine" clients are shown on the wall, including an autographed one from Hilary Swank.
When Roger is riding the horse through the neighborhood he turns a corner on Popper Ln and Cherry St. 'Popper Cherry' is a colloquialism for when a woman loses her virginity.
When Stan drives his SUV after breakfast, Rakim's "Juice (Know the Ledge)" plays.
The title is a reference to the phrase "don't look a gift horse in the mouth".