At the end, when Jane ( Jessica Hagan ) asks Richard ( Randolph Mantooth ) why he changed his stance, he gestures towards books well-known in the animal liberation movement on his desk: 'Making a Killing' by Bob Torres, 'Slaughterhouse' by Gail Eisnitz, 'Terrorists or Freedom Fighters?' by Steven Best, and the DVD 'Earthlings (2005)'.
In the scene where the main characters discuss 'feral children,' they refer to individuals who deviate from non-violent circles, committing acts of violence against people in an attempt to assist animals.