What happens to the pigs' appearance in Animal Farm?

The pigs
do begin to appear to be more human, demonstrating the type of leaders they have become.  The
significance behind this, however, is less literal than that.  It is important to note
thatchooses to portray the pigs in this way at the very end of the book to achieve one of his : 
that power may shift after a revolution, but oftentimes things will stay just about the same for
the proletariat, or working, class.  Power corrupts; as it did Mr. Jones in the beginning of the
book, so it has the pigs.  Life for the rest of the animals remains the same, or
worse.