Heidi is right. The last joint of each toe is amputated - 10 amputations in all.
It's unusual for a cat not to like a scratch post. Is the post rock-solid? Cats will not scratch anything that wobbles.
Try putting some catnip on it, and a toy that dangles near the top.
I just recently brought a small birch log, wrapped some sisal around it and secured it to my inside steps. The cats adore it and scratch it like mad.
