When it gets super cold out our front door sticks. To get it open we almost have to back up, get a running start and slam into it to get it to budge. Dad was trying to get in without a lot of success, which must have sounded like a burglar to Nikki, because she was up on the back of the couch barking like a big dog. When he finally busted in looking like this - wearing his face mask with his breath frozen on the front - she did a 180, ran behind the table and hid. We know she isn't a big guard dog but you would think she could at least bite an intruders ankle to protect us!