I fed my cresties dubia roaches for the first time--from babies to adults, and ALL of them got diarrhea. It went away in a couple of days...tried again about a week later, MORE diarrhea. I fed the roaches the food they came with, a pre-made gut loading formula of which I would assume is mostly some kind of wheat bran, looks like what mealworms come in. I have also fed this same mixture to gut load crickets, and they did NOT have diarrhea from the crix. What gives??