In Chapter 2 of Animal Farm, what causes the animals to rebel against Mr. Jones and his four farm hands?

The
revolution started when Mr. Jones was too drunk to feed the animals or to milk the cows; due to
'sabout the animals being better at running the farm than the humans, the animals revolted.
 This was not Jones's first negligent offense--other farmers remarked that Jones's farm was
poorly run.  In the animals' eyes, Jones was also cruel, as he would kill the animals after they
had outlived their usefulness.  His farmhands follow their employer's example, as they are
equally negligent.  The farm is not run to the satisfaction of the animals--they see that they
should receive the fruits of their labors, not the drunkard Jones.   They wait until he is
intoxicated, then rush to overthrow him.  Since the animals are fueled by the rhetoric of the
now-passed Old Major and Jones is definitely not expecting organized resistance from his
"dumb" animals, it is little wonder that he and his employees are chased off the
premises.