The farmers I knew growing up were also mechanics, veterinarians, pest controllers, engineers, accountants and business men. That was just to farm sugar cane. I would have thought mustering cattle, whatever method chosen to use, was fairly central to the role of being a grazier.
A general point.
Juggling a lot of numerous jobs in any one day and being able to clear ones mind to concentrate 100% on flying is not easy task to get right every hour of every day.
Whatever the outcome of this incident, there is a point, that because flying is so unforgiving, less that 100% of mind on the task or less that 100% correct preflight preparation should be avoided.
Mickjoebill