Be careful about high levels of calcium and Vita D3. They can cause serious harm to the frog. Use the calcium supplement about 2-3 times a week if the frogs are mature. Excessive calcium will lead to nutritional metabolic bone disease. Also, many frogs in captivity has hypovitaminosis A(low levels of Vita A) which cause "short tongue syndrome" that prevents the frog from catching its food. Think about using a variety of foods with carotenoids (color-enhancing and good source of Vita A) to gut-load your crickets: carrots, squash, sweet potatoes, spinach, kale and collard greens. There are supplements with beta-carotene which you can substitute for the carotenoids.