Why a Duck scene
Anybody catch Groucho almost call Chico, Ravelli? At least twice in the why a duck/wire fence scene, Groucho says, "Look, Rav..." before he continues with his lines.
I believe that the Bros were performing Animal Crackers on Broadway at night and filming Cocoanuts during the day and that is why.
But let's face it, Groucho and Chico together were magic! Harpo and Chico were insane!
JLT