Jezebel, the 41 year old donkey, is by herself in the barn because all the other donkeys and horses are away being shown at the county fair. She seems a bit lonely and looks out of her stall disconsolately.
Jeanette goes to the tack room to get her a ginger snap, which is why she makes all the funny faces.
Curling back the upper lip is called the flehmen response. It's something all donkeys and horses do in the presence of an odor that interests them.