Baxter is my 15wk old English Mastiff. I adopted him at 10wks. The first couple of weeks he got up every 2-3hrs on the nose. He sleeps in a 3x5 kennel with a doggie pillow. It took me about 4wks to figure out that he was getting hot. We keep our house temp around 73 but Mastiffs get very hot by nature. They need lots of water and cool air most of the time. I put a fan blowing on him and ever since he sleeps through the night. Priceless