What statement reveals the truth about Boxers death?

Boxer's death is revealed through the statement that he is taken away by a van labeled "Horse Slaughterer." Despite the animals' initial belief that he is being sent to the veterinarian, this grim reality underscores the betrayal and exploitation of the working class on the farm. It serves as a poignant commentary on the fate of those who are loyal and hardworking, yet ultimately discarded when they are no longer useful.