I don't think there can be much that can be done about it. Narla was 2 months old when I got her from the pet shop (they told me she was from the last litter and no one wanted to take her home ) We have noticed that she's been sleeping a lot more recently and she's also a bit skinnier than useral. She still runs down and plays with her wheel, climbs in her cage and comes out to hug us. But she's sleeping a lot at night as well as in the day. I'm wondering if it's just old age or it may be something else? She'll be pushing on 6 months which is 1/3 of a syrian's average life span. What do you think?