What happens when an animal begins to express doubt or concern with napoleons decision in chapter six?

In Chapter Six of George Orwell's "Animal Farm," when an animal begins to express doubt or concern about Napoleon's decisions, it often leads to intimidation and repression. Napoleon and the other pigs use Propaganda, fear, and violence to suppress dissent, reinforcing their authority. The animals are reminded of the supposed threats from humans and the need for unity, leading many to silence their concerns. This highlights the increasingly authoritarian nature of the leadership and the erosion of the original ideals of the revolution.