Calcium and phosphorus are central to cow health at transition and early lactation. Calcium supports milk production, nerve and muscle function and prevents milk fever and down‑cow events. Phosphorus underpins appetite, rumen function, fertility, growth and claw health. Because both are largely stored in bone, the practical way to manage supply is to base supplementation on what’s actually in the feed, especially important on fodder beet or high‑sugar diets. Preload close‑up cows in autumn to reduce metabolic disease risk and protect spring performance.
