Selective Taste

We have a mysterious visitor to the garden... my suspicion is that the adorable woodchucks up the hill have something to do with this. However, they seem to have very discerning taste. In fact, the following photo illustrates the only damage done since the fence went up. I believe that this used to be a Buttercrunch lettuce plant.
Last time they really liked the romaine. Maybe they just felt like a change?
The rest of our lettuces were particularly beautiful the other afternoon- I love the way the varieties are so different. Here we have:

Rouge d'Hiver Romaine and Atlas Farm Red Leaf
Black Seeded Simpson and Red Freckles Romaine
Red Riding Hood and Atlas Farm (a local farm) Red Leaf

Framed by red beets, spinach, and laundry line.