This is just my opinion. Unless the nails are growing too long then you don't need to cut them. I trim both Corkscrew and Tibby's nails every other week because if not their nails hurt me. Both love to cuddle with me and knead on me, if their nails are sharp then I get scratched. If you don't mind scratches and they are provided with enough scratching posts and such then they should be fine as long as you check their nails every once in a while to make sure they are growing so long that it bothers them.