I don't have to cut our ESA's nails, as they do not grow long due to daily walks, but I do need to keep them smooth. I've been looking for a good nail grinder. This product works well. I love that I don't need batteries. It also seems sturdy. My last mail grinder broke, it was light weight, and took forever to file the nail down. This grinder worked quickly, even on low. My dog was calm, and all four paws took less than 10 minutes to have filed smooth. It keeps a great charge! This grinder takes...