I don't know. I find such conflicting info that who knows what is right till i find out first hand. When I find out I'll let you know though. I don't have any previous experience to go by because this is my first attempt, so I'm just kinda playing it all by ear. Out of about 10 worms i had in canisters, 2 were dead and one was definitely curled up to pupate. The others were just chillin in there. I think i may have had to much corn meal in there at first, so i took out all but a very tiny amount. I'll keep the updates coming as things progress.