Ha, I have a great watch dog! He would watch them come in and watch them go out. If they had treats he would hold the door for them! He barks at noises outside...some times but has NO problem with people coming in. Although there was this one time someone knocked on our back door and my dog, Bruno, went nuts barking his macho "I'm the dog" bark. Without opening the door, just looking through the window I ask,"What do you want?" This guy looked a mess, dirty, unkempt, no one I knew. He mumbled something and Bruno Kept barking his warning bark. Again without opening the door I said," Well, HE says you do not belong here and I agree. The guy went away and I never did know who the XXXX he was.