I'm not trying to be rude and please do not take this the wrong way.

But sounds like Shadow is not happy outside, he wants to be inside with you. He is lonely he is more then likely use to having company of the other puppies. Now he is outside by himself with no one out there with him. I don't think it is really fair to him.

Could you least get your mom let you bring him into the kitchen or basement, so atleast he can be near you?

I really not good at giving advice. Maybe someone else here can help you out.