My grandma is 97 and generally ok health wise though obviously quite frail. She's recently been to the doctors and we were told that she's pretty fit for her age - though no tests were done. She's always slept well at night (12+ hours) with a nap each afternoon..but she's suddenly started to sleep nearly all day and night. We are all a little worried as its a big change for her. Has anyone experienced this with an elderly relative?