How old is your cham?
-Regular calcium at every feeding
-Calcium with D3 every two weeks
-Vitamins every two weeks
Check out Sandra's gutloading tips:
https://www.chameleonforums.com/blogs/entry/feeder-nutrition-amp-gutloading.75/
-I would personally buy a dry gutload such as cricket crack, bug buffet, bug burger. Sprinkle a little on a piece of fresh veggie and you're good to go.