I have the same problem with my cats. It may be a good thing my curtains are nailed to the wall... my 20 some odd pound cat likes to lay in the window when the curtains are closed, and he pulls on the curtains pretty hard. My other cat paws at them... lil demons. I can't have the mini-blinds either...the cats break them by forcing their way through all the time... which is why I chose the cheap sheets from Wal-Mart. If they destroy them, it's not too much of a disaster. (I hadn't tried actual curtains before and I wasn't sure how long they would last...)