I feed mine mealworms and crickets. I increase the amounts awhile after joeys are weaned when i am wanting them to breed again. Soon after i have joeys in the pouch. This is just something i do personally as I researched gliders in the wild and their is research to support that when protein is more readily available, successful breeding is more often accomplished. It has worked for me anyway lol. They also like other bugs but I can not find them here in bc. The only one you really should not feed is lightning bugs lol whatever those are. I raise my own mealworms and they have an rolled oat substate.