How did the pigs use Boxer's death to get to the animals in Animal Farm?

In the end, the animals realize the painful truth about
Boxer's death.  Essentially, given Boxer's strength, his loyalty to the pigs and all of
the animals, and his work ethic, the animals sadly realize that if the pigs could get
rid of him, they have no hope.  If Boxer is met with an end that represents how the pigs
use and discard animals, then they realize that their hopes of being saves or spared are
futile.  Given everything else they had experienced, Boxer's death represents the last
straw of hop,e and when that is gone, the animals forfeit any chance of rebellion or
seeking better treatment.  For their part, the pigs use Boxer's death as an example of
the extent of their power.  The story they tell is one whereby the animals learn of the
care Boxer received and then of his death.  Yet, the animals know that the pigs arranged
for his death and with this, the all encompassing power of the pigs becomes apparent and
evident.  In this, the pigs are able to gain a great deal of power and unquestioned
control over the animals.