I have a leather couch, and they don't scratch the leather at all. Bette is about 6 and a half, 6.5 pounds and she has a set of particulary long nails, and we most definately put her on the couch and she DIGS, digs, digs, digs, digs.
She doesn't scratch or mar the leather at all. So, in my own opinion, leather is the best. |