In George Orwell's "Animal Farm," the pigs deceive the other animals about Boxer’s fate by telling them he is being taken to a veterinarian or, in one instance, that he is being sent to a place called "Horse Slaughterer." The quote that captures the pigs' manipulation is when they state, “Boxer is being taken to the veterinarian.” However, it is revealed later that he is actually taken to the knacker's yard.
If you need a more specific quote, here’s one to illustrate the pigs’ deceit: "It was noticed that they did not actually say that Boxer was being sent to the knackers." This reveals the pigs' dishonesty and how they manipulate language to control the other animals' perceptions.