Well that depends on how big your lion is. Sometimes the shell can turn them away from the worms since it can be a hassel to the little ones and doesnt have much of a flavor. You can pop the heads off and squueze them a little to entice the lion to check them out, since the guts inside are apparently delicious to them, IMO..eww. Once he starts taking them like that, you can see if he will accept a whole one. As long as he is good size, the super worms are ok, but if not, I would say drop down to the regular meal worms. You can also give them a vit-soak too for added nutrients.