The Dog inside our house

My dog named sooyen, He wants to always stay inside our house, we keep him outside because he is shedding and my son had an asthma, but he keeps opening our door and staying in. He even want to have slippers with him, He is a photogenic dog, I take a pic of him and yes he looked at the camera. Instead of him, my son is the one who asked to stay in his room so he wont have an asthma attack, while the dog, yes will going to stay inside the house. He won over my son.