I got both boys used to it very early I use a cat-specific, scissor-like tool, as it keeps the nails from splitting now that they're older. There's no noise or loud "snick" so it doesn't startle them. The first few times we had to use a blanket to swaddle them with one leg out, and it was a joint procedure with me and the hubs. Now, they either sit in my lap or stand next to the sink and I clip them over the bowl. Treats sometimes follow, but not always. We just made it something they have to do with no option to get out of it. They don't play with claws, but both like to sit on laps or crawl over us and one startle or slip, and we're scarred. Plus, the door jambs are a hot mess.
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