Lois, a sheep, gets lots of laughs as she moves her head or says “Baa!” Almost 50 years after its debut, Sam Shepard’s “Curse of the Starving Class” is still crushing the American Dream.

MOO, MOO, MOO! MOO, MOO, MOO! I went to visit a farm one day, I saw a sheep across the way, And what do you think I heard it say? BAA, BAA, BAA! BAA, BAA, BAA! I went to visit a farm one day ...