Right now, my Cobalts are eating fruit flies and they are quite happy and fat with them. I have tried offering pin head crickets to them. But they weren't interested. I'm not sure if that was due to me putting them in a small container to try feeding a few pinheads.
How do you folks introduce new food to your darts? I have been thinking about adding some flour / rice beetles to their diet. But do you actually feed the beetles or do you just feed the larva?
If you do just feed fruit flies, how do you get calcium and vitamins into the darts? Is the stuff that the flies breed in enriched in anyway?