I found the last one dead this morning.
I think other than needing to double (or triple) bag, the packaging was sufficient. The bags are really thick and heat sealed. I had ordered so much other stuff (snails, rics, etc) that there was no room styrofoam peanuts. They use styrofoam sheeting to line a cardboard box rather than a complete styrofoam box. Its not the greatest packaging I've seen but its not bad.