Oh no. I'm sorry to hear that! I didnt know sugar gliders can not show sickness that must be horrible not knowing if they are sick. I know caring for an exotic pet can be harder then a normal pet.
Aw your sugar glider sounds really sweet! My sister wants a sugar glider for a pet as well. I think I'll do Basil for my hen since I keep going back to that name :D
I just love herb and tree names, I have a chicken named Willow as well! :) And my new hen is an Olive Egger so I'm thinking Basil is a good choice, But my siblings think it sounds more like a boys name to them.