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Title: Not so great on big dogs
Review: My medium-sized dog was scared by the noise so I don't know how well it would have worked on him; for my larger dog's nails, it did not seem powerful enough to grind them down effectively. Even with the coarsest grinding wheel, it took a long time to do each nail and even then I was worried about the amount of "heat" building up from the friction. I regularly get her nails ground at the vet and no issues there, so perhaps the portable home-use variety is just an option for the small dogs with thinner nails.
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