My cat has a toy mouse that she carries around everywhere. Usually everywhere I am, there she is and her mouse isn't far away. He will be waiting at the front door or beside my shoes or by the bed. She doesn't want to play with this mouse, he just has to be near. I have tried replacing with a similar one because, well, this toy has seen better days, but she won't have it. It's sweet to see her carrying that mouse around, but I'm just wondering if anyone has any ideas on why she does this. No other toy gets this special treatment.