I would recommend Silkworms and hornworms (these are easy to order off line and at a good price). They are both have excellent Ca:P ratios (one of the best out there) and are loaded with protein, good fats and appropriate levels of Vitamin A and D. I would add this along with earthworms (very nutritionally balanced), crickets and roaches. Here is a site of someone who I regularly purchase feed items from. YOUR BUGGIE HEADQUARTERS