I have yet to have a cat who went after my knitting. I don't understand how this has happened, but YAY. The closest I've come was when someone sent me some alpaca yarn and I left it on the coffee table. Juhani wrapped herself around the skein and started licking it, and was very sad when I took it away. But other than that? No cats playing with my yarn, even when they're sitting in my lap while I'm knitting. I'm lucky!