Supplementation Strategies for Stocker Calves Grazing Summer Pasture Late summer is a pivotal time for stocker operations grazing both native rangeland and introduced pastures. Although native grasses and Old World bluestem can provide ample forage during the growing season, their nutrient content, particularly protein and energy, drops sharply in late summer or during drought. Similarly, introduced species like Bermudagrass are typically high-yielding and maintain adequate protein levels, but their digestibility and energy content decline as the season progresses, limiting stocker weight gains. Strategic supplementation can sustain optimal growth rates and improve profitability, but success depends on selecting a supplement that complements the pasture’s nutritional profile.
Why Supplementation? Correct major nutrient deficiencies: As forages mature, their digestibility and protein levels decline. Stocker calves, especially those with high growth potential, may not meet their nutrient requirements from forage alone. Supplementation provides additional energy and protein to help calves maintain target average daily gains, improve feed efficiency, and reach market goals on time.
Deliver feed additives and minerals: Medicated feed additives and minerals can be provided with the supplement to ensure proper dosage. Medicated feed additives improve performance and the efficiency of supplementation and are often highly economical when included with supplements. Minerals are vital to all bodily processes, and deficiencies can negatively affect growth and immune function.
Support livestock management: Often overlooked economically, supplementation also provides management benefits. It allows for easier observation of cattle, improves disposition and handling of animals not accustomed to human interaction, and enhances grazing distribution when supplement is placed in underutilized areas.
Increase pasture carrying capacity: Feeding higher supplementation rates can replace a portion of forage intake, effectively increasing pasture carrying capacity. This approach is useful for maintaining stocking rates during droughts or boosting them under normal conditions.
References: Beck, Paul. “Supplementation Strategies for Stocker Calves Grazing Summer Pasture” Cow-Calf Corner Newsletter, August. 2025.
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