The OAD BV evaluates the tendency of a bull’s progeny to be more efficient in a once-a-day farming system.
The biggest factor in making OAD successful is milking the right cows. A higher OAD Index is more desirable. As a rule, Jerseys are more efficient in a OAD system.
Once-A-Day Milking Selection Index (OADSI)
LIC has developed a OADSI to help OAD farmers breed animals most suitable to their system. In June 2015, the index was overhauled after considerable consultation with the OAD community. The new index has a strong correlation to Breeding Worth (BW) but also combines four functional traits that farmers told us dictated the survival of a cow in a OAD herd:
- Udder Support
- Front teat placement
- Milking Speed
The index also has less emphasis on Fertility and Residual Survival because these traits are less of an issue to OAD farmers. Our goal is to support OAD farmers in breeding cows that persist throughout the lactation and have longevity in the herd.