Back in the fields, the shepherds discover one of their sheep is missing and immediately suspect Mak and Gill. Angrily, the shepherds claim that they will not rest until they prove Mak guilty and recover their sheep. Coll knows where Mak lives, so the three men set off to confront him.
The shepherds not only suspect Mak—they suspect Gill as well, implying that Mak and Gill are known to be partners in crime (literally). Also, the shepherds are shown to be somewhat vengeful here, even if their anger is justified.