Over the last ten days or so, my chickens have now added the area below the porch as a food source in their morning stroll. And get this! Jackie, our top of the totem pole hen is now roosting on the edge of the porch right next to the larvae. I am jealous, my wife always wants me to go in the house to sleep. I will have to come up with a way to direct her poop right into the tote for the little guys to have fresh manure.
It's not a recommended practice to feed manure or offal from one class of animal (mammal, reptile, bird, etc) to a BSF colony and then feed the harvested BSF grubs back to that same class of animal. I don't know the science behind it, but I believe that when you create a loop (bird -> grub -> bird) that you can encourage the development of pathogens. That's what I've been told anyway. I believe this rule only applies to live or untreated grubs and that you can safely feed sterilized grubs to the same animals that supplied the nutrients to raise the grubs. Cooking the BSF thoroughly should sterilize them and dehydration might also work. I recommend you do some research to be sure.
Theoretically you don't have to re-start a colony maintained through winter. You can simply continue feeding and remove the insulation. I had to restart my colony this spring because I didn't maintain it properly over the winter and by spring it had become mildly anaerobic (stinky). I harvested most of the BSF and put a few cups of the old compost (attractant) in the cleaned out BioPod with some new food scraps. The juvenile larvae/grubs never require any bedding material.
