The problem with using wool for cats is that they will eat it... or try. It is an animal fiber and even after all the processing, it smells like animal fiber to them. I have 3 cats and they love the loos weave crocheted baby blankets that i do. They knead them up wonderfully before i wash and bag them to give away. Of course every bed has one so they don't have to travel far, but if they can't find one specific one, they will drag their favorite from wherever.