Most people here advocate using escarole, dandelion greens, mustard greens, snow peas and bok choy as staples and avoiding lettuces. On the other hand, Douglas Dix at Deer Farms uses spring mix as his staple, at least according to his caresheet. I'm sure that there isn't a "correct" answer, but it seems that people here are adamant that lettuces provide poor nutrition. I'd love to hear what basic diet has worked best for people, especially for hatchlings.
And as always, I really appreciate everyone's thoughtful responses!

