Dairy Goat Feed-to-Milk-Production Calculator
Match grain concentrate to your doe's actual milk output, plus a forage guideline based on her body weight.
How this calculator works
Extension guidance is consistent: about 1 lb of grain concentrate for every 3 lbs of milk produced during early and peak lactation, tapering to roughly 1 lb per 5 lbs of milk in late lactation as production naturally declines. Forage intake is estimated at 3–5% of body weight in dry matter per day — this tool uses the midpoint, 4%, as a planning number.
Where these numbers come from
- 1 lb grain per 3 lbs milk (early/mid), 1 lb per 5 lbs milk (late lactation): University of Missouri Extension (G3990) and Alabama Cooperative Extension System (ANR-2457)
- Forage dry matter intake at 3–5% of body weight: Alabama Cooperative Extension System
Individual goats vary — body condition score is the real feedback loop. Adjust grain up if a doe is losing condition despite following this guide, and down if she's gaining excess weight.
Frequently asked questions
Why does grain concentrate scale with milk output instead of body weight alone?
A doe in heavy milk production has real, immediate energy demands tied directly to how much milk she's making, so concentrate is dosed against actual output — body weight alone would either underfeed a heavy producer or overfeed a dry doe.
Does forage still matter if I'm feeding grain?
Yes — forage (hay or pasture) should still make up the bulk of a goat's diet by body weight; grain concentrate is meant to supplement energy for milk production, not replace forage as the foundation of the diet.
What happens if I overfeed grain concentrate?
Excess grain relative to forage can lead to digestive upset (including a serious condition called acidosis) and unwanted weight gain, so matching concentrate to actual milk output rather than guessing helps avoid both problems.
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