NOTES.
The main factors of Breeding Bulls selection.
— The right genetics
— Age of bulls
— Management on the day of turnout
— The start of the fourth week of the mating period
— Rotating bulls
Selection of cows/heifer
— Select heifers at weaning based on these economically important factors:
◦ Early birth in the calving season — early born heifers will have a head start on development, reach puberty sooner and have higher conception rates earlier in the breeding season
◦ Heavier weaning weights
◦ Utilize adjusted weaning weights to account for age differences
◦ Fertility of the dam
◦ Calving ease
◦ Milking ability
◦ Structural soundness and frame size
◦ Disposition
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