I think that the implied reader for animal farm is not a child. This is because of the implication of the story and what it symbolizes. For example also the story is not one truly suited to younger readers because of the fact that the story has not got a happy ending, it is also not a finished plot unlike most child books. The fact that is symbolizes the hypocritical government of Russia also shows that it is meant for a reader that understands what it is about.