Do you cut cat's nails

If you must trim the nails of your cats, you should use something like this:

The hole at the end of the clipper keeps the nail in place as you trim it like this:

Be very careful not to trim off too much. Cut off only the tip. If you cut too far in, you will draw blood and your cat will be hurt. Once it's hurt, you will have a hard time persuading it to let its nails be trimmed the next time.