There has always been more than one way to mate your cows to reach the goals you have set for your farming business.
The generic genetic approach is to randomly use high index ranking sires and keep turning over your herd to have the highest indexing sire stacks in their pedigrees.
The purebred genetic approach is to consider “type” equally with “production” and combine competitive indexes with cows of superior conformation.
The traditional genetic approach is to only use sires from deep “cow families”, ie, where cows have had superior maturity and a lifetime of function for generations.
All these approaches actually do work for people today. Thus there are all these kinds of sires available, once you know where to look for them.
Mich Livestock Service, Inc ph (989) 834-2661 110 N Main St. Ovid, MI 48866