OK.. So, I have decided for this next batch of pens to be permanent. I am trying to decide on the configuration - it will be either (6) 10X12's, or (3) 20X8's. (120 square feet versus 160 square feet) Which do you guys think would be better? And how do you landscape yours? I already am doing a few ornamental grasses, but not sure what else would avoid trampling/eating.