Ranger does this if I take the my two girls outside to play/train. Wails, howls and bites at the door. I have had to crate him in the back bedroom to muffle the noise. He is getting better, we don't have to crate him anymore as long as someone is present inside to say "quiet", he knows what it means. I have my son or daughter sit with him and he wil listen now. He has also learned that his turn is next and I reverse who goes first as well.