In the interest of full disclosure I must inform all interested parties that my egg shell/slug battle has been lost. Upon returning from my week away I found my cabbages chewed to absolute bits. We're talking a very intricate and all encompassing lace pattern from top to bottom of every leaf. Slimy jerks. I guess egg shells need to be replenished frequently or crushed even more course. My friend suggested diatomaceous earth. Maybe next time I'll try that because these poor babies cannot be saved. There may be a positive not, though. The lettuce heads right next door suffered little to no damage. Maybe the cabbages were a sacrificial experiment?