A long time ago, my Chuck woke me up in the middle of the night growling and hissing. Come to find out my boyfriend at the time was trying to sneak in quietly so he wouldn't be in trouble for coming in so late. Well, Chuck wasn't about to let anyone slip in un-detected, he sounded like a wild cat! That really surprised me that he would try to protect me while I was sleeping. I always figured he'd go hide or something.