The theme of deception is prevalent in chapter 8. What qualities in animals and which human vices make them vulnerable to decpetion?in Animal Farm

I think that one of the fundamental vices that enables the
animals to be susceptible to the pigs' deception is the trust in government/ fear of
voicing dissent.  From the public executions in chapter 7, the animals have come to see
Napoleon's brutality and the consequence for speaking out against his rule.  Once
Napoleon has made this absolute, it becomes very easy to manipulate the animals into a
position of complacency.  The animals who speak out are promptly executed, such as the
chickens who try to kill Napoleon.  It has become evident that there is really no one to
speak out against the pigs and Napoleon.  It is this reality that makes them vulnerable
to deception.

Whether or not this is a vice could be
debated.  The animals don't gain anything from this, as they are merely seen as means to
ends for political satisfaction on the part of the pigs.  Yet, it is this trusting
nature or the inclination to not say anything because of fear of reproach or political
retribution that places them in a position in which they are easily
manipulated.