You can begin by listing the seven commandments, and then talk about the ways in which the were altered;
Whatever goes upon two legs is an enemy.
Whatever goes upon four legs, or has wings, is a friend.
No animal shall wear clothes.
No animal shall sleep in a bed.
No animal shall drink alcohol.
No animal shall kill any other animal.
All animals are equal.
the alterations became;
No animal shall sleep in a bed with sheets.
No animal shall drink alcohol to excess.
No animal shall kill any other animal without cause.
The pigs broke the commandments by;
walking on two legs, moving into the farmhouse and sleeping in beds, wearing clothing, execution (by the dogs), and don't forget the sham of inequality.