You should catch that goat. Then you can milk it!
That goat is jumping from pole to pole if you use the switch next to the bulletin board.
Maybe if it would slip?
From an oil puddle, for example.
Do you see where the gutter in the tower ends?
Go pour some oil to the gutter in the tower. You can find oil from the bronze tap in the lab.
Collect the oil into the blackboard bin you find from the lecture hall. Pour the oil into the gutter (in the tower).
Now, pull the switch until the goat turns into a piñata. You can go and milk it now for feta cheese.