What does “first shearing” and “second shearing” mean when a young mob is added to the Mob Book?

In the Mob Book, first shearing generally refers to a young mob being shorn for the first time, such as lambs, weaners or other young sheep that have not previously been shorn.  

Second shearing refers to sheep that have already been shorn and eligible for DMFR risk calculation in merino mobs.

 If you are unsure, check the mob’s shearing history or confirm with the grower before completing the Mob Book.