Andis Cord/Cordless Nail Grinder
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Nails, especially dark ones and dogs that hate the clip: a grinder files the nail down a little at a time, so you can stop well short of the quick and leave a smooth, rounded edge instead of a sharp one. Andis is a long-standing professional clipper maker, and this model runs on battery or plugged in, with two speeds: start slow on a nervous dog.
The trade-off is noise, vibration and time. Introduce it switched off, then running, before it touches a paw. Touch each nail for a second or two at a time, because friction builds heat. Tie back long hair on feet and tails, and your own, before starting.
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