What a little cute pie, Love those dark eyes of his.
Im no expert but at his weight I would have to say that yes, he would be at risk of Hypoglycemia. You may want to keep some Kyro syrup on hand just in case.
I've never dealt with one so tiny. I would think that several small meals per day would be the best way to keep his sugar levels up.
Below is a site with some info that may be helpful.
Canine Hypoglycemia