In captivity, they are almost exclusively carnivorous. Even workers will feed from insects. I've tried offering them sweets, but they don't eat them. They eat seeds in the wild, but for some reason they don't in captivity. Mine have been doing just fine on insects alone. Mine seem to do best in Tarheel Ants setups, especially mini hearths. I had them in a mini hearth for a while and eventually moved them to an acrylic nest. They were in the acrylic for a few months, and no new workers eclosed. I moved them back into a mini hearth, and new brood appeared within a week.