I am with you on this one Jods. My babies are always finding little bits of string and *stuff* from who knows where!! Sometimes I know it is off the edges of their cat tree and I have tried to trim it really well. It is like having babies again and guess we just have to keep our eyes out all the time!!! If there is something to be found, they WILL find it. They eat tissue, dryer fluff, etc. Seems like I am always pulling something out of their mouths!! It is a stage that will pass.