DairyComp 305 is the most widely used dairy management platform in the world — and most farms are using only 20% of its capability. Here is how I use it to drive reproductive performance.
The Foundation: Data Discipline
Software is only as good as its data. We enforce mandatory same-day entry for:
- Calvings (with calving ease score, calf sex, calf ID)
- Breeding events (sire, technician, method)
- Pregnancy checks (date, examiner, days pregnant at confirmation)
- Treatments (drug, dose, route, withdrawal date)
Without discipline here, your reports are unreliable.
Key Reports for Reproductive Management
21-day Pregnancy Rate (PR):
The headline metric. We target ≥25%. It is calculated as:
PR = Conception Rate × Heat Detection Rate
Drilling into which component is limiting you drives very different interventions.
Heat Detection Rate (HDR):
We run FETCH and FETCH2 reports weekly to identify cows that have not been observed in heat or serviced. This surfaces animals falling through the cracks before they become 200 DIM open cows.
Conception Rate by Sire:
Revealing — and sometimes surprising. We use SIRE reports to evaluate AI sire performance quarterly and make procurement decisions.
Reproductive Herd Summary:
A snapshot of where every cow stands: days in milk, days open, number of services, last event. This drives the weekly vet/manager walk agenda.
Timed AI Integration
We run a Presynch-Ovsynch program for cows not detected in heat by 50 DIM. DairyComp's event-driven alert system automatically flags which cows need GnRH, PGF2α, and AI on the correct days — eliminating reliance on memory or paper lists.
The Outcome
By systematically using these tools, we improved our 21-day pregnancy rate from 17% to 27% over 18 months — without changing genetics or hiring additional staff. The data was always there. We just started listening to it.