How were Snowball’s actions during the Battle of Cowshed changed even further?

The wheat fields turn out to be filled with weeds, a misfortune that the animals blame promptly on Snowball. A gander confesses to knowing about the plot to mix weed seeds with the wheat seeds and commits suicide. To bring further ignominy upon Snowball’s memory, Squealer disseminates a rumor that Snowball never received the title of “Animal Hero, First Class” at all. As usual, he is able to quell any questions that arise from his rewriting of history.