Trying to trim my labs nails with this contraption was like trying to trim a tree stump with a butter-knife. The smell was nauseating, I should have known better and worn a face mask because after attempting to trim one nail without success I ended up with a terrible sinus headache. The Pedi Paws nail trimmer might work better on smaller breeds with owners who have no sinus issues. But for large breeds it is, in my opinion, worthless.