To get them to pupate and turn into the weird alien looking thing that twitches, lol. You need to separate them. I know it will be another step that you will have to do but 9/10 times they will pupate faster and quicker. Just buy one of them craft boxes for likes beads or whatever, they will have like 50 little boxes and you put a grown superworm in there and put the box somewhere dark and Bam you got the alien stage, lol. And yes I did breed the superworms, they were alot bigger so easier to manage and see what's going on. I think their dying of old age because they don't have any reason to change. I mean their covered in oats have a steady supply of a water source, why change. In wild I have found mealworms(grubworms really) and their always in a narrow space with no light and in the pupa stage. hope I have helped, ask if you have anymore questions.
