Well I've never seen any of my cats attached to anything to this extent but I do remember that when I adopted Sky the Humane Society gave me a big brown catnip mouse to take home with him. He used to sleep with it every night for a while. I guess you could say in the beginning that it was his security blanket.

Pearl loves straws and she'll carry them around in her mouth but she won't sleep with them. She likes to leave them in my bedroom sometimes. I think it's her way of giving me a little present. Ziggy used to also do this with her pipecleaner spiders but she hasn't done this in a long time.