I over froze a large BB yesterday and thought about this thread. Instead of making the dead fly into cricket food, I gave it to a mantid that had nothing since it ate a bee earlier in the day, so I put the fly in with the female adult Creo and she went for it as long as it was right out of the freezer and smelled fresh and it was moving in the container not just sitting there. I had given the whole thing a little shake so it looked alive for the split second that it took the Creo to nail it in her raptorals. There is always something new to try. If one fails, one learns, if one at first succeeds, there also is an easier lesson learned.