My cham is 3 months. He's eating 1/4-3/8" BSFL, dubias and crickets. All three feeders are fed leftover tortoise food that my torts don't finish. So mostly greens and Mazuri Tortoise diet formulas 5M21 and 5E5L
Greens are mostly dandelions, grape leaves, and romaine lettuces sprayed with calcium carbonate and water solution.
Ingredients and specs for Tortoise diet 5M21 is as follows:
https://www.mazuri.com/product_pdfs/5M21.pdf
Crude protein not less than 15%, Crude fat not less than 3%, Crude fiber not more than 18%
Ground soybean hulls, ground corn, dehulled soybean meal, ground oats, wheat middlings, cane molasses, wheat germ, dehydrated alfalfa meal, dicalcium phosphate, soybean oil, brewers dried yeast, calcium carbonate, salt, dl-methionine, choline chloride, pyridoxine hydrochloride, mixed tocopherols (preservative, form of vitamin E; citric acid, rosemary extract), d-alpha-tocopheryl acetate (form of vitamin E), manganous oxide, zinc oxide, ferrous carbonate, calcium pantothenate, niacin, copper sulfate, menadione sodium bisulfite complex (source of vitamin K), riboflavin, l-lysine, zinc sulfate, thiamine mononitrate, calcium iodate, folic acid, vitamin a acetate, sodium selenite, cobalt carbonate, biotin, vitamin B12 supplement, cholecalciferol (vitamin D3).
Ingredients and specs for Tortoise LS diet 5E5L is as follows:
https://www.mazuri.com/product_pdfs/5E5L.pdf
Crude protein not less than 12%, Crude fat not less than 4%, Crude fiber not more than 22%
Ground timothy hay, ground soybean hulls, dried beet pulp, oat hulls, wheat middlings, ground oats, dehulled soybean meal, cane molasses, dried apple pomace, wheat germ, flaxseed, ground aspen, carrageenan, ground brown rice, dicalcium phosphate, soybean oil, artificial flavor, calcium carbonate, brewers dried yeast, salt, l-lysine, dl-methionine, choline chloride, pyridoxine hydrochloride, d-alpha tocopheryl acetate, biotin, dried yucca shidigera extract, cholecalciferol, beta carotene, menadione sodium bisulfite complex (source of vitamin K), calcium pantothenate, folic acid, vitamin A acetate, riboflavin, sucrose, fructose, thiamine mononitrate, vitamin B12 supplement, nicotinic acid, Lactobacillus acidophilus fermentation product dehydrated, Lactobacillus casei fermentation product dehydrated, Bifidobacterium thermophilum fermentation product dehydrated, copper sulfate, Enterococcus faecium fermentation product dehydrated, torula dried yeast, natural mixed tocopherols (a preservative), citric acid, manganous oxide, ascorbic acid, rosemary extract, zinc oxide, lecithin, ferrous carbonate, zinc sulfate, calcium iodate, sodium selenite, cobalt carbonate.
I think the tortoise formulas make pretty good gut load for the feeders.