What are the amendments and their abuses to the seven commandments in Animal Farm?

1. Whatever goes upon 2 legs is an enemy. 
 
Near the end pigs started walking on 2 legs.

2. Whatever goes upon four legs, or has wings, is a friend. 

These so called "friends" are seen as lesser beings later on.

3. No animal shall wear clothes. 

At the end pigs are wearing clothes.

4. No animal shall sleep in a bed. 
Changes to "No animal shall sleep in a bed with sheets".

5. No animal shall drink alcohol. 
Changes to "No animal shall drink alcohol to excess". 

6. No animal shall kill any other animal. 
Changes to "No animal shall kill any other animal without cause".

7. All animals are equal. 
Changes to "All animals are equal, but some are more equal than others".