The big deleted scene from Zootopia with collars on the predators has been mentioned here before, but we have to include it because of how dark it truly is. This scene, for those who haven't heard, would have shown that the predators are kept in check in Zootopia because they
wear a shock collar that keeps their instincts debilitated. The scene that introduces this was very sad and very dark, but it was taken out because it changes the entire mood of the film. This scene implies that the predators in this town are forced to hide their true selves. They are not able to let nature take its course because it threatens the prey. This message, for a film all about society and being yourself, is not a very happy thought. Although the filmmakers of Zootopia wanted to get a message across, they probably didn't want it to be so dark.