Well I just tried something today. I was thinking to save money and I found a way to save on crickets.
I froze a couple crickets. And then once they froze, I took them back out, and thawed them. I tied the cricket on a string from the tip of the leg; the foot. And then I dangled it in the cage. It works! They frogs are fooled into thinking it's alive. They both ate a thawed cricket.
So from now on, I'm going to freeze my crickets, so they last longer, and don't die on me. It basically preserves the cricket as if it never aged once you stick it in the freezer.
I just figured I'd share that idea, in case any of you would like to give it a shot.