Katie, all our cats have had intact claws, and none of them has ever clawed the "hard" floors (rugs have been a different matter). We used to live in a house with shellacked oak floors, and our current house has parquet in the living room and upstairs hallway. I really doubt you'll have a problem, but if you do, I'd suggest getting some small, cheap wool or wool-blend rugs for them to claw. Or synthetic ones you can turn upside down, so that the cats can work on the backing. Until it went out of business, a home furnishings store here used to "order" an extra set of carpet samples for me from their suppliers, and sell them to me for a few bucks. My sister still does that - I think it's a local "Menard's" she gets the samples from.