If a producer wishes to include non-production traits in a breeding program, they should be added in a way that does not seriously jeopardize the emphasis placed on the produc- tion traits.
Selection should first be placed on the production traits. Then, mating of individual cows can be based on the non-production traits of those sires of interest.
If you initially select sires on non-production traits, it can seriously affect income because of decreased production.
Always select on the traits that generate the most income.