What has Napoleon made of the sheep In animal farm?

If snowball was at a crucial moment in one of his speeches, The sheep would say "Four legs good, Two legs bad", this would take the other animals attention away from snowball and the point he was trying to make.

bob: So to put into simpler Words, bacon is unhealthy because--

John: FOUR LEGS GOOD, TWO LEGS BAD

bob:.......

John: HAHAHAHAHA YOU SUCK