Having raised dubia blaptica roaches for my crested geckos, I would expect that is an excellent insect source of food for chickens during the winter. Before anyone goes EWWWWWWWW ROACHES, if the enclosure is kept clean they have no smell. I kept the colony in the basement. And dubia are a tropical roach species, if they escape (they can't fly or climb glass, I kept them in a rubbermaid bin escapes only happen if I was stupid and dropped one), they'll die pretty quickly. I fed them cheap cat food, fruit and vegetable scraps, dry grain, and crested gecko diet (I'd pop the leftovers from the cresties into the bin and they'd devour every tiny bit). For moisture I gave them cricket gel (not the insanely priced gel found in petshops, I'd get the crystals in bulk, 1oz of crystals poured into a gallon of distilled water = a gallon of moisture gel for insects). I found them a million times easier to raise than mealworms, and much more productive too. Their only requirement is they need warm temperatures to breed. I used a small strip of flexwatt heat tape to do the trick.