Calculating Dynama+ herd bull requirements

The Dynama+ program calculates bull requirements by multiplying the figure entered for the bull cow ratio (or bull percentage) by total cows mated, including those sold after mating.

If the calculation of new calves is set for mating and calving in the same budget year, the bull requirements calculated will relate to that calving. If budgeting on a financial year, with a midsummer calving, the mating for that financial year will actually relate to the next year’s calving, so the formulas will be of no use.

Manual entries may be made for bull purchases and retention of BYO (Breed Your Own) bulls. These entries will override the formulas that would otherwise have calculated retentions of home-bred bulls, sales and purchases.