What was the last major change of the pigs to make them indistinguishable from humans in Animal Farm?

's pigs had already made
the transition to nearly complete human-like behavior. They slept in beds, ate human food, drank
liquor and, in the end, they proudly began to strut upright on two legs. Whenmet with their
human neighbor farmers in the final chapter, this time in friendship, they toasted one another
and Mr. Pilkington commented about the pigs "having your lower animals to contend with...
we have our lower classes." They all...