http://www.mro.org/zmm/zenarts/oxherdinggallery.html

This picture gallery has paintings by Master Gyokusei Jikihara, and the verses by Master K'uo-an.  The "Ox-Herding Pictures Series" illustrate  spiritual development from the moment the student enters the Way until the completion of training, when they become masters in their own right. This site mentions that this set of ten compiled by Master K'uo-an is the most commonly used. Check out that master in the last one.  :-)  I wonder if anyone we know looks like that.