I use a dremel (more or less like this one).
It seems to be much easier on the dog; apparently a guillotine clipper still hurts and squeezes a little even when you're using it properly.
Here's an older post about how to get them used to one:
Dogs are generally more comfortable having their nails dremeled than having them clipped. Dremels don't seem to pinch or squeeze the nails the way clippers do; you can get a nice smooth edge to the nail; it's much easier to avoid hitting the quick. But they do make noise and vibrate the nail as they grind it, so you have to go slow introducing one.
Here's a nail trimming demo we put together a long time ago.
https://www.dobermantalk.com/doberm...ns-nail-trimming-dremeling-demonstration.html
Here's another. I had asked for a picture of the underside of the dog's nail, because that's how I tell how much to take off. See post #21
https://www.dobermantalk.com/doberman-health/27115-nails-how-much-dremel.html (Unfortunately, this is an old post, so some of the links to pictures don't work anymore, but the picture on post 21 is still there, fortunately.)
This about how to get your dog used to a dremel:
"Just take it slow...depending on what she will allow...you may even need to start with rubbing it all over her with the motor off. Then with the motor on, but just somewhere in the room at a distance, then touching a nail for a second or too, then grinding one nail, then a whole foot and so on.
And of course, lots and lots of treats---sometimes even after every toenail when you get to the full foot thing.
Go ahead and start getting her used to the thing. Keep clipping if you need to until she is OK with the grinder. But, of course, do the grinder introduction randomly throughout the day and not in the same session as clipping time.
Two hints...
1. Always support the nail with a finger or thumb as you grind . That lessens the vibration on that toe, and I imagine makes it less tickly for her.
2. Never grind on one nail for more than few second at a time. The area you are grinding can get quite hot. If you need to do more grinding than that, just go on to another nail and come back to the first."
I use a cordless Dremel multipro--the rechargeable battery doesn't have a super long running time--if you're doing multiple dogs in a row, that could be a problem for you--but a corded dremel is rather a pain to use (for me, anyway)
Dremel style tools marketed specifically as nail grinders for pets often don't have enough power to do tough dobe nails--it's really better just to use an ordinary hobby dremel with the coarse sandpaper roll.