What rumour was circulationg about snowball?

The rumor circulating about Snowball in George Orwell's "Animal Farm" was that he was secretly collaborating with Mr. Jones, the farmer they had overthrown. Napoleon and the other pigs used this rumor to discredit Snowball and justify their actions against him, portraying him as a traitor to the farm. This manipulation of information helped to consolidate Napoleon's power and control over the other animals.