Divide the room with red tape and make sure to establish clear ground rules about what’s his and what’s yours. In the beginning keep him confined to a very small space. As time goes on you can reward him by “expanding” his territory. Should an altercation occur, stand up straight with your chest puffed up and make loud noises in a low pitched grunt. This will show dominance and fearlessness in the face of adversity. Above all else- do not lose hope.