I too do not know of any reports of mad dogs, but if a dog was to stalk me then jumped up for a hold, he must be mad. I forgot to mention an important piece of information.
Go for the gut; in and up like the way of the Samurai. They not only bleed but actually trip over their own guts. This way you don't have to drag the carcass too far to dump it into the river.
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Know fish or no fish.