As far as I am aware, Roman, any roaches are high in protein, so I think as long as they are the appropriate size, you are good to go. I can't get Dubia roaches at all in Canada, so I started my own colony of Hissing roaches and so far, all of my frogs/toads and reptiles have loved them. Gut-loaded crickets, earthworms (which are my African Giants main food source), roaches, locusts, and grasshoppers are all good staples for your frogs. Yes, I would definitely dust your crickets. For my young frogs, I have followed a dusting of two days in a row of calcium, followed by one day of vitamins. Once my frogs reach adulthood and require less feedings, I do one of each once a week, or once every two weeks, depending on if they want to eat when I offer food. If you switch to a different staple other than crickets, continue to dust your food. Do not use the calcium and vitamin supplements together, though, as your frogs will not be able to take full advantage of both supplements at the same time. Always alternate. Hope this helps and I can't wait to see those pictures!!