Once the first sidequest was completed, I was able to do the quest again. Suggestion to have this set when a sidequest is completed, to not be able to do it again.

In addition, when I choose to not start the sidequest, the lamb NPCs were lined up in a diamond shape and still interacted with the "!" above their heads. Suggestion to only show lambs roaming around without "!" above heads and occasionally run away when moving closer to them.