Gut-loading is the practice of feeding insects a diet high in calcium, protein, and other nutrients prior to offering the insects to reptiles and amphibians. Domestic crickets and meal worms should be fed a commercial, grain-based calcium enriched cricket diet such as those made by Flukers or ZooMed, or a diet consisting of four parts chicken or turkey starter mash and one part calcium carbonate for two or three days before offering the crickets to your pet. Also, offer the crickets water in a shallow dish or wet sponge. Gut-loading beyond 2-3 days is not beneficial, and can actually decrease the life expectancy of the insects.