To be honest his barking was a huge concern last time I took him. He barks at the drop of a hat at home, which we're painfully working on.... Anyway last time I was traveling alone and needed to run into the store. It was hot so I didn't want to leave him in the car so I figured I'd try crating him in the room. I crated him and went outside for about 10 min. Unfortunately/fortunately the hotel had put us in a high traffic area. Within 10 min people had walked by talking, a couple of cars had driven by the window, our neighbor came out closing the door (not quietly), a dog even barked, and not a peep out of him. So I figured I was safe and went to the store. When I pulled back in what do I hear......him howling I was horrified. Later I ran into the people next door to us and apologized. They said they actually hadn't heard anything out of him until they heard me come back. Then I remembered, he always knows the sound of mine or my roomates cars at home and starts howling as soon as he hears them, and I'd parked right outside the room..... He's a little.....ok lot strange