Nothing contains a more balanced nutritious food for ABFs than earthworms. I feed both Canadian night crawlers and crickets to my African Bullfrog, around a 50/50 ratio. Crickets are dusted with Ca every other meal and with a multi-vitamin once a week (not at same time). Be sure to keep crickets smaller that distance between frog eyes and cut earthworms to similar size if required. Can feed all your frog will eat within 10-15 min. Good luck!