Very nice shot! For a springer, especially .177, the shot placement had to be almost perfect to kill him, and you did! Sorry to hear about your dog though:( There are coyote's at my grandparents house, if they ever get within range they had better look out, my condor will be waiting! Good shooting! I would have never thought .177 would have done that, however since you used a predator it doesn't surprise me too much as they are excellent pellets.