Working dogs really do work to serve the community. They use their nose and their sense of smell is incomparably keen relative to ours. Humans only have 5-6 million olfactory receptors, while dogs have 220 million. Click here to read article.
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Viewers have tried to comment, so I have opened up comments to the public again. (Due to repeated abusive language submitted by one person, I have restricted comments for a while.) The sporadic technical glitches persist. I see blank comments coming in frequently. Blogger needs to fix this, one of these days. Please email me if your comment does not appear.