Dramatic Irony, Power, and Control

What is ironic in Squealer's statement to the animals?

Squealer say that all of the other animals are "equal". He is saying that the pigs are better than all the other animals on the farm. He says that the pigs need the beds because "they think to 
much, and need to rest their minds". This is braking the commandments.

In what ways does Napoleon control the other animals? Give three examples from chapters 5 and 6. 
In chapter 6 it tells us that Napoleon is treating the animals slave, and now they have to work on Sunday afternoons. This is where Napoleon has to be kicked out. He is to much of a tyrant. In chapter 5 the dogs chased Snowball out of the barn.