The best feed for a nursing cow is plenty of good-quality forage, plus extra energy, protein and minerals as needed to match her milk production. A cow nursing a calf has the highest nutrient needs of her year, so she should never be underfed.
Why nursing cows need more
Oklahoma State University extension notes that early lactation takes about 50 percent more energy and nearly twice the daily protein of a dry cow. Peak milk for a modern beef cow can reach about 25 pounds a day. Cows that lose too much condition now often rebreed late.
Start with forage
- Pasture. Fresh, leafy pasture is the cheapest and best feed for a nursing cow.
- Hay. Aim for good-quality grass or grass-legume hay and test it. A nursing cow eats roughly 2.5 percent of her body weight in dry matter in early lactation.
- Silage and haylage. They fit well when moisture and fermentation are good. See how much silage to feed cows.
Supplements that help
- Protein. If hay is below about 10 to 12 percent crude protein, add a protein supplement such as soybean meal or a commercial range cube.
- Energy. Byproduct feeds such as beet pulp, or a measured grain mix, can fill an energy gap. See the best grain mix for beef cattle.
- Minerals. Offer a free-choice mineral with salt, formulated for beef cattle in your area. Calcium, phosphorus and magnesium matter most during lactation.
- Water. A lactating cow can drink well over 10 gallons a day in warm weather, so keep clean water always available.
Common mistakes
- Letting cows get thin before calving and then trying to catch up.
- Switching feed suddenly, which can cause digestive upset.
- Feeding too much grain, which risks acidosis.
- Skipping minerals and relying on salt alone.
Check body condition
Score your cows at calving, mid-lactation and weaning. Cows that are thin at calving need more feed sooner. Heifers nursing their first calf are still growing and usually need extra.
Bottom Line
Feed nursing cows the best forage you have, add protein and energy only where the forage falls short, and keep minerals and water available. For a tailored ration, ask your extension agent or large-animal vet. See also our pregnant cow feeding chart.
This article is general information, not veterinary advice.
