Don’t Call Us Horse Doctors!
“Thirty-seven doctors in the continental U.S. had the same name the writers had given to Groucho Marx in A Day at the Races. It was feared the studio would be sued the minute they were portrayed on the screen by Groucho as horse doctors.”
What name was dropped and replaced with Hackenbush? The answer is Quackenbush.
— Source: Marx Brothers – Night at the Opera Treasury
Trivia