That link was amazing and I bookmarked it. It also looks like crows and dogs and probably other species can share their desire for revenge with other crows and dogs and get their cooperation. Here is a link from that link showing this: http://www.seeker.com/angry-birds-cr...765286502.html I hadn't considered the social aspect of this, but that made me realize I assume those animals act as individuals. That even needs to be questioned.
My most intense encounter with Fred was after I walked that half mile back to the cabin finding Fred chewing on one of the birds. The surviving bird flew to a perch out of the way, but there was only room there for one bird. She could see all of the damage. Fred saw me, dropped the bird and went inside the cabin as if he were going to defend that place as his own. I walked in and listened to his growling and saw his bared teeth. I got onto my knees so I could more easily defend myself and hold him down when he came at me. I had his chain in one hand and I told him harshly to come to me. We stared each other down and I expected him to attack. I wasn't sure if I would survive that encounter unharmed. Then he lowered his head and walked over submissively and I chained him. I felt sorry for him at that point and forgave him whether he forgave me or not.