LOL Eliza will hide when she hears someone come up the stairs to our door, Mozart will go to the door or close by to find out who it is, and Bach will do either.. if there's a kid he will run and growl (i don't know why, he's never been around kids) if it's an adult he will hide then come out if he thinks they are worthy enough to be in his presence (or he's just jealous of Mozart getting all the attention!)