The following are a few links, which will give you some more information regarding the mealworm problem.
Basically, it is probably best to avoid mealworms, as they are not good nutritionally, but maybe reduce them gradually. Hoglets are probably at most risk as they can also become addicted to them and not want to eat anything else. If you have hoglets still in the nest they will need good nutritious food if they are to have any chance off reaching the minimum weight to survive hibernation. You are probably best off sticking to the cat food, which should provide better all round nutrition.