I have a huge 90 lb American Staffordshire Terrier. He is absolutely terrified of nail clippers so I have never been successful at clipping his toenails. We've even brought our dog to the groomer, and even with several people holding him down the groomer could not safely clip my dog's toenails. I'm looking into trying out the dremmel but I don't see how my dog will be any less afraid of a grinding apparatus than a small nail clipper. For now, I just let him run around on cement and take him out for long walks on sidewalks to get file his nails down. If I have the time, I might try to train my dog to file his own nails on a sandpaper board or scratch board. There are websites out there that give advice on how to train dogs to file their own nails using positive reinforcement, so for those of you who have trouble clipping your dog's nails, I recommend you try out these alternative methods.