The stocker phase sits at the crossroads of beef production -- linking the cow-calf sector to the feedlot -- and management decisions made during that stage echo all the way to harvest. A recent review of research from 1995 to 2024 in Applied Animal Science highlights how genetics, grazing management, supplementation, growth technologies and health programs used in stocker systems influence later performance in the feedlot.
Most U.S. calves spend time in a stocker or backgrounding program before entering the feedlot. While producers often think of that phase as just a way to add “cheap gain,” it also provides value by sorting cattle into uniform load lots, increasing resilience by getting calves through weaning and commingling stresses, and spreading calf inventory through the year. Stocker systems vary widely across regions, forage bases and management goals, but research shows some consistent themes.
Genetics -- U.S. calf populations are diverse due to regional adaptation of the cowherd. Grazing smaller-frame and early-maturing calves prior to feedlot entry can help them reach acceptable harvest weights with larger carcasses without becoming overly fat.
Grazing management -- Pasture strategies that boost grazing gain can have mixed effects during finishing. Restricted gain on pasture may lead to compensatory gain in the feedlot, but it often reduces lifetime performance and marbling potential.
Supplementation -- Supplements are used to correct nutrient deficiencies, manage grazing behavior or increase stocking rates. Research shows variable effects on feedlot performance -- some programs have no impact, while others can reduce efficiency during finishing.
Growth-promoting technologies -- Ionophores improve stocker gain by 10 percent without affecting feedlot performance. Implants improve gain 10 percent to 20 percent in the stocker phase with little impact on finishing performance and efficiency, though some studies suggest reduced marbling with aggressive implant programs.
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