Sulfur dioxide is added during the wet milling process to aid in the extraction of starch. As a result, the sulfur concentration in corn gluten feed ranges between of 0.33 to 0.73% DM, which may be higher than the upper safe limit in cattle. Feeding large amounts of corn gluten feed can lead to sulfur toxicity, leading to reduced feed intake and possibly death. A specific disorder associated with excess sulfur is polioencephalomalacia ('brainers') which affects the nervous system, causing blindness, incoordination, and seizures. Excess dietary sulfur can also increase the risk of a copper deficiency (Myer et al., 2011).
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