How is boxer betrayed?

In George Orwell's "Animal Farm," Boxer, the hardworking horse, is betrayed by the pigs when they sell him to a glue factory after he collapses from exhaustion. Despite his unwavering loyalty and dedication to the farm's cause, Boxer is deceived by the pigs' Propaganda, believing they would care for him in his old age. His betrayal symbolizes the exploitation of the working class and the corrupting influence of power. Ultimately, Boxer's fate highlights the tragic consequences of blind loyalty and the betrayal of revolutionary ideals.