How times have changed
Caesar, the circus lion that had showed a strong strain of viciousness throughout the film, kills a guy who got too close to the cage. Today that would probably ruin the little show when it had to pay damages for the guy's death. But in the film's America, it's dealt with as unfortunate but that's all. No damages or liability on the circus. Not important but just an interesting difference.
"All necessary truth is its own evidence." - Ralph Waldo Emerson