Here we generally have too many ropers.  So they trade off.  Those ropers who aren't roping become wrestlers.  The exception is ropers who might be longer in the tooth.  There is 5 women who regularly show up and rope.  3 of the 5 wrestle when not roping and they are pretty darn handy at both.  The other two who don't wrestle, one is in her 60's and the other a new mother who takes care of the baby when not roping.  The iron, vaccinations, and castrating all have designated people who generally do that chore through the entire branding.