According to Marc Bekoff's "The Emotional Lives of Animals," wolves experience deep and complex emotions the same way humans do. When wolves lose a pack member, they become depressed and despondent, hanging their heads and tails, and circling the dead bodies of their loved ones. Wolves have also been reported to howl in a long and mournful way when a pack member dies.
For the Judas wolf, who is forced to watch his friends die time after time, the grief would be unbearable.
Besides the audio evidence proving the existence of the Judas wolf, the Wildlife Defence League managed to get rare photographs of a wolf from a trail camera placed in the South Selkirk region.
Based on the camera's location, Knowles explains that this particular wolf is probably one of the slain, or even the Judas wolf before he was collared: "It's absolutely tragic to think he may still be out there alone, after watching his entire pack get slaughtered. Whoever the wolf in the photograph may be, the cull now has a face."