We had a siamese kitty name Shadoe that carried around a little black and white bean bag cat. We had just had her spayed when she stole the toy out of my son's room and started carrying it around with her. If she left the room and came back and couldn't find her "baby" she would meow loudly untill someone would find it for her. We always thought that maybe she knew she couln't have kittens and pretended the stuffed animal was a baby. I guess we'll never know for sure.