Could it be that I'm dusting too much? I dust 3x Ca and 1x Multi vit but on dusting days I completely cover almost every single piece of worm I feed. Could this be too much maybe?

I honestly was thinking of feeding variety, but as of now since my frogs are still babies and don't really eat much it would be pointless to buy earthworms, crickets, roaches, waxworms and hornworms all at once because they will probably end up drying before my frogs are able to eat them. I will buy a pack of waxworms today to offer them as treats but how often should i feed these treats then?