Begin by placing your mouse over any of the six yellow buttons next to the names of the six creatures that live with the zebra. This will tell you something about that creature. To choose whether that creature is a friend, freeloader or foe of the zebra, click on it.

In the red dialog box that pops up, choose whether the zebra likes that creature (FRIEND), doen't mind it (FREELOADER), or wishes it would go away (FOE).

Then move on to the next creature.