Average Days Open is the average number of days from a cow's most recent calving date to the latest reported breeding date, or from the most recent calving date to date of test for cows not bred and in milk 60 days or more. Cows in milk less than 60 days without a breeding date are not included in the calculation of days open. Two profiles of open cows are included in Summary of Current Breeding Herd for additional evaluation of days open. The two profiles differ because cows in G have no chance of being pregnant, while cows in H may be determined to be pregnant in the near future. Open cows with breeding dates are summarized in the second profile.
P is diagnosed pregnant.
For these herds cows bred 60 or more days prior to the current test day without a new heat date, breeding date, or diagnosed open are assumed pregnant. Not D-P as the heading of this profile. Cows in these herds remain in the Summary of Current Breeding Herd until a diagnosed pregnancy is reported. Special attention is necessary for cows in the category Open over 140 days. This is the absolute minimum calving interval possible.