Comment by Robotbeat

But where do the invertibrates get THEIR food from? Feed corn is super cheap per calorie (people sometimes burn feedcorn in stoves for heat), so it’s probably what you’d feed the invertebrates.

Edit: Yup, insect farms typically use grains as the feed. Grains which you could eat directly (after baking or cooking, of course) which would be more calorically efficient. https://www.theatlantic.com/health/archive/2015/09/americas-...