Hi Graham,
I currently use the Crested Geckos (and other Rhacodactylus diets) to feed my roach colonies (Dominos, B. dubia, lateralis, E. decipiens). They love the stuff and you can feed it wet or dry. Here are the ingredients of the 'standard' Crested gecko diet:
(Calcium caseinate, banana powder, honey powder, Hempola hempseed meal, bee pollen, alfalfa leaf meal, defatted wheat germ meal, brewers yeast, fig powder, calcium carbonate, dicalcium phosphate, yeast culture, spirulina algae, rosehips powder, kelp meal, haemotococcus algae, marigold extract, rosemary extract, yucca extract, natural mixed tocopherols (as a preservative), vitamin A acetate, d-activated animal sterol (source of vitamin D3), dried aspergillus oryzae fermentation extract, dried aspergillus niger fermentation extract, dried lactobacillus fermentation product, dried bifidobacterium thermophilum fermentation product, dried bifidobacterium longum fermentation product, dried enterococcus faecium fermentation product and dried bacillus subtilis fermentation product.)
it might be worth a try!
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Nicole Chaney
www.stickytoegecko.com