When the manager of the hotel is showing the various cleaning products, he mentions a rock band trashing their room and roasting a goat. The rock band is, of course, the one from This Is Spinal Tap (1984), which featured many of the same actors as this film.
Much of the film was improvised. The narrative outline was only 16 pages long.
Fred Willard (Buck Laughlin) was specifically instructed by Christopher Guest not to do any research on dogs. Jim Piddock (Trevor Beckwith), on the other hand, had to do a lot of dog research so that his character would appear knowledgeable. As a result, Guest says some viewers are surprised to learn Piddock is not a real dog show judge.
Real judges and professional handlers were used for most of the judges. The professional handlers also served as technical advisers for the actors in how to handle the dogs in the ring.