I was wondering if anybody could advise me, I have two siamese cats, a three year old boy and a recently turned two year old girl. Cosmic the male has been for lack of a better description biting his nails for almost as long as I can remember. He will just from time to time sit and literally start biting/ pulling at his nails. This morning for the first time I noticed Mia doing it too. They are indoors cat with several cardboard type scratching posts spread trough the house. They are taden out under supervision for "catwatch" as often as we can manage so they can climb trees and sharpen claws on real bark. Is there anything I can do about this "nail biting"? Will trimming their nails help? Different type of scratching post? Or is it just something some cats do and I should just leave them at it?