I freeze my canned after opening, u got a big boy, go 4 exoterra. It's 8$ but a big can, can o' crickets are real small. Grasshoppers are huge and hard, but there's silk worms and other stuff to. They go bad after a week, so I just freeze em right away. And the thread was about Walmart worms in paticular, that they could be raised by someone not following regulations in place to keep native waters clean. I was contemplating bait fish instead of pinky mice, but fisheries don't test for chytrid I guess. I paid 5$ for a doz crawlers from Petco garenteed to be parisite free. They live forever in fridge in original container.