02/22/2026
Choosing the Right Feed for Laying Hens in a Mixed Flock
Feeding a mixed flock of hens and roosters can feel confusing, especially when you’re trying to support strong egg production without harming your rooster. Understanding protein and calcium levels in feed is key to making the right choice.
The Calcium Difference Matters Most
Laying hens require 3.5–4% calcium daily to produce strong eggshells. Traditional layer feeds typically contain 3.7–3.9% calcium, which is ideal for hens in active production.
However, many higher-protein “all flock” or grower feeds contain only 1.4–1.9% calcium. While this level is safer for roosters, it is not sufficient for consistent shell quality in laying hens.
It’s important to note that adding a lower-calcium product (such as a 12% protein scratch blend with 0.45–0.95% calcium) will not increase calcium levels. In fact, mixing it into feed can dilute overall calcium content.
Why Roosters Should Avoid Layer Feed
Roosters do not require high calcium levels. Long-term exposure to layer-level calcium may contribute to kidney strain or gout. For mixed flocks, a moderate-calcium base feed is safer.
The Best Solution for Mixed Flocks
The most effective and safest method is:
Use a 20% all-flock feed as the base ration
Offer oyster shell free choice in a separate dish
Oyster shell contains approximately 38–40% calcium. Hens instinctively consume extra calcium when needed, especially in the afternoon when eggshell formation begins. Roosters typically ignore it.
Crushed, baked eggshells can also be offered as a supplement, but oyster shell remains the most consistent and reliable source.
Final Recommendation
For mixed flocks with a rooster present, a balanced all-flock feed combined with free-choice oyster shell provides strong shell support while protecting male birds from excessive calcium intake.
Proper nutrition ensures healthy hens, strong eggs, and a safe environment for every bird in your flock.
Photo Credit: Beard's Farms