I came home to find a hairball unlike any I've ever seen before! It was a long string of plastic. I knew instantly which of my three cats it came from, as only one of them constantly licks plastic stuff...but I didn't know he was now swallowing it! Can someone please tell me (a) why he does this, and (b) if it's dangerous? I don't even know where he got this plastic, as I've been careful to hide anything-plastic since I found out about his "addiction" fro fear he might choke to death or something. This cat means the world to me and I'm just really very worried. Thanks in advance...