In Chapter 9 of Animal Farm, the narrative takes a dark turn as the reality of life on the farm deteriorates further, with the themes of betrayal and disillusionment coming to the forefront. This chapter begins with the aftermath of the harsh winter, where the animals face severe food shortages. Despite their hard work and dedication, their situation grows increasingly dire. The pigs, particularly Napoleon and Squealer, use propaganda to maintain a façade of prosperity, deceiving the animals into believing that their sacrifices are necessary for the greater good.

Boxer, the hardworking horse and a symbol of the working class, embodies loyalty and dedication. He continues to work tirelessly, even as his health declines. He adopts the motto, 'I will work harder,' and believes that through his labor, he can contribute to the success of Animal Farm. However, his unwavering loyalty is tragically misplaced. Napoleon exploits Boxer’s strength and work ethic, pushing him to the brink of exhaustion.

As the food shortages worsen, the pigs make a decision to sell Boxer in order to procure money for food. The other animals are horrified when they see a van labeled 'Horse Slaughterer' taking Boxer away. This moment marks a critical betrayal, as Boxer had always believed in the principles of Animalism and the promise of a better life for all animals. His tragic fate serves as a poignant commentary on the exploitation of the working class by those in power.

Napoleon and the ruling pigs attempt to cover their tracks by spreading propaganda, claiming that Boxer is being sent to a veterinary hospital for treatment. Squealer, who acts as the mouthpiece for Napoleon, manipulates the truth to maintain control over the other animals. Despite witnessing the van and hearing the truth from other animals, many still cling to their belief in the leadership, showcasing the effectiveness of propaganda and the power of denial.

As the chapter progresses, the remaining animals grow increasingly disillusioned. The original ideals of Animalism seem to evaporate, replaced by a grim reality where the pigs indulge in luxuries and privileges reminiscent of their former human oppressors. The commandments are further altered to suit the pigs’ actions, leading to a complete erosion of the principles for which they initially revolted.

This chapter deeply underscores the themes of betrayal and the cyclical nature of oppression. The once hopeful vision of a society where all animals are equal is completely shattered, and the animals find themselves trapped in a regime that mirrors the tyranny they sought to escape. The fate of Boxer serves as a powerful reminder of the consequences of blind loyalty and the exploitation of the vulnerable by those in power. By the end of the chapter, the animals are left with a profound sense of loss and confusion, struggling to reconcile their idealistic dreams with the harsh reality they now face.