I'm always impressed that the old lady has such great stamina on walks. I don't think she was really exercised before coming here so I wasn't expecting her to be able to be so active. Our walk this morning was cut short at 2.5 miles, and at the end of it she was still ready to do more. I'm not sure what age I would guesstimate her to be at, but I just don't think she's 13.