In Animal farm what commandment is changed at the end of chapter eight and why?

At the end of Chapter Eight in "Animal Farm," the commandment "No animal shall drink alcohol" is altered to "No animal shall drink alcohol to excess." This change reflects the pigs' increasing corruption and hypocrisy, as they indulge in behaviors that contradict the original ideals of the farm. The alteration highlights the erosion of the animals' rights and the pigs' manipulation of language to maintain control over the other animals.