I once saw a blackbird kill a robin. It actually decapitated it by getting it down on the ground, standing on its back, and pecking through its spinal colum at the neck. I was in my car, stopped in traffic at the time, and I just watched in amazement.
They look a lot like dogs too, and that always tugs at my heartstrings. I expect if they were a type of rare squirrel or something I wouldn't get that melancholy feeling -- like I might have lost a friend -- along with the natural sense of regret at losing something unique.
Ali, on my home blog, I captioned it "I can't believe I ate the whole thing!" (But I know there are delicate sensibilities here..)