We just adopted our first rescue dog and yesterday was her first day with us. She is a Saint Bernard and is about 1yr old. We also have another Saint who is 19 months old and an 8 yr old English Mastiff. Phoebe was up most of the night trying to get someone to play with her. She and Teddy my other Saint played for hours yesterday and I thought for sure she had to be exhausted. Is this a behavior that is being exhibited because this was her first night with us, or is she confused about what goes on at night?