I think that there is a sense of pure shock that overcomes the animals in chapter 5. Since the start of the Revolution and leading up to it, the animals had been used to Snowball and Napoleon representing the leadership component of the farm. Even though significant divergence between both had become a reality, the animals had become conditioned to seeing both in a leadership capacity. The sheer force and will with which Snowball was dismissed from the farm was startling to the animals, a force that Napoleon understood in a very adroit and politically skilled manner. It was here in which the animals were unable to protest on a large scale, primarily out of the shock and awe with which they saw part of their leadership run off the farm. When the porkers try to resist some of the changes articulated by Napoleon, there is resistance from the dogs' growling and the sheep bleating, representing both how the animals through submission and force. It is in this representation where the animals on the farm are not able to protest the decisions that Napoleon makes in chapter 5 on a large scale.