The character of Squealer is the one who consistently manipulates language for control of the animals. Orwell writes that "he could turn black into white". As propaganda chief for the pigs, Squealer has an answer for everything: why the commandments of Animalism seem different, and why the "ambulance" called to take Boxer to the hospital has a sign for a horse slaughterer on its side. He also helps rewrite the past when he makes the animals believe that Snowball, who Napoleon wants to discredit, never had received the order of "Animal Hero, First Class." All of this is done, of course, to control the animals so they will not question the pigs' leadership.