They chewed their way out of the case they came in. Given enough time, they can chew their way through cardboard. I got two cases on Sunday at the Manchester show but couldn't set up the bins till Tuesday. In the meantime they chewed their way through one of the boxes, there were crickets every where. I have rounded up the majority of them and put them in the bins where there is food waiting them.
I would't through out a cricket simply because it is no longer "gut-loaded". Just toss it back in the bin and feed it. Besides no matter what, a cricket still has some nutritional value, even if its only protien.