I am by no means a frog expert, however, my experience is as follows:I feed my crickets a high calcium diet, both the sources I get my crickets from also feed them this diet, and I have never had to dust the crickets. My frog has thrived on them without any additional supplement. I have a cricket keeper which is simply a small plastic tank with a lid (I had a beta fish in it at one time).I keep small pieces of cardboad egg crate, or toilet paper tubes in there. You get your crickets from wherever, and dump them in when you get home. Provide the crickets with a good high calcium diet. I use flukers diet and quencher. I just pick up one of the cardboard pieces (the crickets hang out on/in them) and capture the crickets this way. Crickets will escape no matter what. You will get good at catching them. My cats have become expert cricket catchers too, unfortunately.