Almost all the animals had a very bad memory so they were not able to remember things of major signifigance. After a little while the pigs would mention the past and the animals would not remember what had happened so they would agree with the pigs. The the battle of cowshed, snowball was a very herioic animal in that battle but Neapolean said that that was not true that there memory had deceived them, that
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showed last 75 words of 999 total
vast intellect compared to the rest. All the pigs had to do was to say that what they were doing was for the good of all the animals and they would all do what they could to help them. From the part in which the pigs took charge till the end of the novel the animal had accepted these changes that the pigs had done, for they where not able to fore see the future.