Thanks! Yeah, they HATE mustard greens. Before I got them, that is all they were fed. They won't touch them now if there is other food in their enclosure. The spring mix I buy has baby lettuces (red, green romaine, red, green oak leaf, red leaf, lollo rosa and tango), red and green chard, mizuana, arugula, mache, frisee, radicchio lettuces in it.
I will look for the other lettuces tomorrow when I go grocery shopping.
Thanks!