My almost 5 month old pup, Simba, has been sleeping outside, but be really want him to sleep inside. The problem is that our room has a carpet floor and we are afraid of him peeing and stuff inside the room in the middle of the night. We always let him in except for the night. We dont have a doggie door. Simba mostly doesnt pee inside, but sometimes he does but never poo. He doesnt know to stand in front of the door so that we let him out. I was wondering if anyone could tell how to train him to sleep inside...He is really calm and even takes naps on my bed sometimes..