This commandment is referring to humans since they walk on 2 legs. Besides birds who do have wings another that can walk on to legs is not part of their team.
No animal shall sleep in a bed.
This commandment means that all the animals on the farm are a family and there should be no reason for one to kill another.
No animal shall drink alcohol.
This commandment relates to whatever walks upon 2 legs is an enemy. all humans are their enemies so doing things they would do is against the commandment like wearing clothes.
All animals are equal.
This commandment connects to all others because they do not want to be like their "enemies" (humans)😡. they do not want tofolloww their actions.
this commandment was made to keep all animals safe because it is very unsafe for animal to drink.
This commandment clearly states that all the animals share the same rights, and don't have any more or less.