I started clipping my cats' nails a few months ago - the vet said a regular set of human nail clippers would be fine, so I have been using them. Last week, I was checking the length of their nails and noticed that some of them are splintering and getting fuz caught in them. I never noticed this before I started clipping the nails. I never cut them very short because I am so afraid of clipping the vein - Am I doing something wrong to cause this splintering? Could something else be causing it?