Anyone got a formula they use, I have a health store close by wanted to try any dry recipes before the wet. I am getting a couple hundred blue bottle flies
You are kinda limited on the gut load.
bee pollen
powdered milk
honey
molasses
fruits
fruit juice(other than apple/orange)
reptile vitamins dissolved in some of the above.
PS: while disgusting to clean, its a good idea to not leave the liquids in a bowl, but soaked into something like a paper towel or cotton ball.
Here's a good fly food recipe I got from Kammerflage:
Since the flies emerge with empty stomachs, you will want to "gut-load" the flies to make them nutritious for your chameleons. You can mix a soft-boiled egg (mashed to a smooth consistency) with a few teaspoons of plain yogurt, baby rice cereal and some honey.
Just make sure it's pretty thick and sticky and smear some on the side of the fly container. I made my first batch too liquidy and drowned almost all of my flies and pupae!