Sigh... I'm not sure how far we put back our training. I was working with Leo, differentiating between a box with scent, and an empty decoy box, and she got ahold of a bug that was on the ground in between them (hadn't noticed it was a bug, thought it was a bit of wood or some such). She spat it out, ran off, and absolutely refused to come back to the boxes. She had been doing pretty well up until then, but after that, she shut down.