Of all of the animals, Boxer is the one who most accepts and works for the ideals of animalism. He does not seem to notice that things are rotting, and Animal Farm is becoming a more opressive place. Boxer is further exploited by Napoleon and the pigs because he is loved and appreciated by the animals, he is loyal and he is a hard worker.
Boxer's two favorite sayings are "Napoleon is always right" and "I will work harder" so he is the ideal subject for the pigs. He sacrifices his free time and his health, and serves as a distraction for the other pigs since he works on the windmill constantly. Boxer never realizes that he is being exploited, and continues to be a loyal subject until his death when Napoleon sends him to the glue factory.