Distillers solubles (condensed corn distillers solubles or corn syrup) is a liquid feed product that is readily available and usually inexpensive relative to nutrient composition. Solubles are normally 25-35% DM and contain about 19% fat, and 25% CP on a dry matter basis. Because of the high fat content the syrup is close to 120% TDN. The syrup is high in phosphorus, so P supplementation is not necessary. Syrup is also high in sulfur. The challenge with distillers solubles is that you must have storage and unloading facilities to handle liquid feeds. In most cases, storage equipment is sized to handle 1 or 2 semi-loads.
Therefore, purchasing large quantities (much more than 2 semi-loads) may not be feasible if the solubles are handled as a liquid. Handling distillers solubles brings challenges inherit in all liquid feeds such as equipment and pumps, circulation of the liquid to ensure that "settling" does not occur or separation and the potential for freezing in cold temperatures.
We have done some work in feeding the solubles. This byproduct is extremely palatable. I am not comfortable recommending feeding this product "free choice". One would think with the high fat content that intake could be easily regulated. Our experience has been that, if offered free choice, cattle will congregate around the feeding area until it is gone. Individual intake will vary and the "boss" cows will consume the most. The reason for the concern about free choice feeding is the high sulfur content.
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