Mammals in nature can drink milk because they have special micro organisms in the stomach during their infancy to help break down lactose. After a while those organisms die off and are replaced by other bacteria that break down solid foods. Humans are the same way. Lactose intolerance in humans is normal. People that are lactose tolerant are an anomaly that came to be over generations of force drinking milk centuries ago.

Yogurt once a week is different than cream cheese everyday. Thats why dogs and cats get diarrhea when you feed them whole milk. Their stomachs arent built for that. Like all mammals. We are the ONLY mammal that consumes mill after their infancy.

But dont take it from me. A quick google search or chat with your vet will confirm this. Just looking put for gliders in general. Happy trails.