Late this afternoon, I was sitting in a chair, near the window, in the sun and the two cats decided they wanted to sit with me. So, I grabbed the clippers and while they were basking in the sun, I clipped their back nails. No resistance at all. I think the baking sun relaxed them enough to turn them into putty - allowing me to clip clip clip... snip, I should say. It is the first time I was able to do both cats - all nails! Yea!