within the ranks of the pigs which three are predominant?why?

That would be:

Napoleon- The most dominant and power hungry pig. He is shrewd in the ways of politics and intimidation.

Snowball- He is extremely intelligent and clever. He wants to improve the lives of animals. His naiveté of Napoleon's cut throat tactics become his undoing.

Squealer- Dictators like Napoleon need good public relations. That is they need someone who can twist words, ideas and messages. Squealer is the mouthpiece who allows Napoleon to intimidate and manipulate others.

When you read about super candy Mountain, what is suggested? what does the name of the raven suggest?