The fictional film "Prognosis: Negative" is named after an unproduced screenplay by Larry David in which the main character wrongly assumes a negative prognosis is bad news. ("prognosis" means a likely outcome, while "diagnosis" means a collection of symptoms; therefore, a negative prognosis means a negative outcome, which is in fact bad news)
In a deleted scene, Kramer reveals that he fed Farfel turkish taffy, which would have explained the dog's erratic behavior and frequent barking.
Farfel, the dog that never stops barking, wasn't played by an actual canine. Tom Williams, a voice-over artist, made all of Farfel's noises off-camera.
In this episode George (Jason Alexander) asks Jerry, "Isn't it more fun using the urinal?" In a previous episode however, he claimed to be a "stall man."