im so happy that most went for the knife thing. thats why i carry razor sharp ones, two of them, one in each pocket. go for the dogs eyes, go for the mountain lions eyes. they cant function without eyes. slit their throat, when they are up and close give them your non dominant arm, it can be fixed, kill with the dominant arm. a knife works for human criminals also. out it comes and they will say, what did you just do to me, a few seconds later they will pass put. one doesnt need a 6 inch blade to slash deep. if your allowed to carry one like that, do so. make sure it is razor sharp. a dull knife is only good for puncture, not slashing. dogs dont come on my place much, the few that have and lingered, died and went in the compost pile.