Friend of mine got a Great Dane puppy who is 13 weeks now and wanted to start socializing him with other dogs. He knows Mouse is dog friendly and not going to pounce and play hard with the pup. Friend thinks socializing with another giant breed dog that is calm and confident may help with those fun stages coming in a few months. Holding Mouse in 2nd pic because every time wife tried to take the pic he would lift his head and twist around scaring the pup, past that pup slept on Mouse and hid behind his butt on the floor a lot of the night. 3rd pic fat head found out what puppy teeth where.