Runner Ducks are among the most active domestic duck breeds, and their constant movement means they burn calories at a higher rate than heavier, more sedentary breeds. A well-balanced diet should provide adequate protein for muscle maintenance, calcium for eggshell production, and enough carbohydrates and fats to fuel their characteristic upright, fast-paced foraging style. Laying hens in particular need consistent nutritional support to sustain their impressive annual egg output without depleting their own body reserves.
Protein requirements shift throughout a Runner Duck's life. Ducklings need starter feed with around 18–20 percent protein for the first two to three weeks, after which it should taper to roughly 15–16 percent on a grower ration. Adult Runners doing heavy laying benefit from a layer feed containing 16–17 percent protein and at least 3 percent calcium. Drakes and non-laying ducks can be maintained on a slightly lower protein maintenance ration to avoid kidney stress.
Because Runners are prolific foragers, a significant portion of their nutrition can come from free-range grazing if your property supports it. They are exceptional at consuming slugs, snails, insects, and tender greens, which naturally supplements their commercial feed. However, free-range intake is unpredictable and seasonal, so a complete commercial waterfowl feed should always remain the dietary foundation. Relying solely on foraged food leads to inconsistent nutrition and can result in thin shells, feather loss, or weight fluctuation.