How does Napolean resolve the struggle for power over snowball? Is this effective?

After Snowball completes his blueprint for the windmill, the animals hold a meeting at which Snowball wins over the majority with his descriptions of the leisurely life that the windmill will allow. Suddenly, Napoleon signals “nine enormous dogs wearing brass-studded collars,” which barge into the barn and chase Snowball out. Snowball manages to escape through a hedge. The frightened animals gather once more in the barn. As it turns out, the nine dogs are Jessie’s and Bluebell’s puppies. They seem to consider Napoleon their master. Napoleon takes the stage and announces that Sunday meetings with all their accompanying debates will cease, and he will lead a small committee of pigs in making decisions. T