I don't follow your logic. Yes, dogs unfortunately kill people but the numbers don't even compare remotely to deaths from firearms. (The website attributes 30 human deaths per year to dogs and notes how thoroughly they are investigated.)
Not to start a debate here, as it doesn't matter what side your on with gun control, but this comparison is total apples and oranges.
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"When I read about the evils of drinking, I gave up reading." Henny Youngman