DEFENSE-80 Profit Calculator

Net Return (/yr) —

Return on DEFENSE‑80 —

Cost / Successfully Reared Calf —

More Calves at Weaning Target (/yr) —

Treatment Days Avoided (/yr) —

Calves & Program

Newborn Heifer Calves / Year

Newborn Bull Calves / Year

Pail Price / 25 lb pail

Dose g / calf / day

Start: First Milk Replacer Feeding day of life

Milk Replacer Ends day of life (weaning) — label allows through day 80

DEFENSE‑80 Use weeks, from first milk replacer feeding (1–12)

Heifer Value (replacements)

Include

Heifers replace older cows so the herd keeps milking. A preweaning death loses the calf’s value plus the milk, labor and vet care already spent on it — not the full cost of raising her to calving.

Value Lost per Heifer Calf Death

ADG Weaning to Breeding

Heifer Rearing Cost / day

Healthier, heavier heifers reach breeding weight sooner: days saved × rearing cost/day. USD 2,651 = cost to raise a heifer to calving (Iowa State Univ. Extension 2024). Turn on Long-term to add future milk from better growth.

Value Breakdown (all calves, per year) Waterfall

Tip: click any bar, matrix row or summary card to see the formula and your numbers worked through.

Scenario Matrix USD

Line Item	Per Heifer	Per Bull Calf	Heifers / Year	Bull Calves / Year	All Calves / Year