Live crickets are an essential food source for many reptiles and amphibians, despite their relatively low nutrional value. To ensure that your insect-eating reptiles receive the nutrition they require, it is imperative that the crickets they eat are fed a healthy, balanced diet (a process known as "gut loading"). The Cricket Block from Zoo Med provides supplemental calcium and nutrients to promote optimal health in crickets and the reptiles that dine on them. This special formulation includes a varied assortment of nutritious vegetables (Alfalfa, Carrots, Spinach, etc.) encapsulated in a solid calcium sulfate block. It is super-easy to use - just place the Cricket Block inside your cricket enclosure! Proudly made in the U.S.A.