Due to the rapid expansion of the ethanol industry cow-calf producers are asking many questions concerning the use of wet distillers grain in their operations. Because most cow-calf producers cannot use a semi-load of wet distillers grain quickly, methods for extended storage are foremost on their mind. Additionally, producers are inquiring about how these long-term stored products will feed in various management systems. Previous work in the feedlot suggests distillers grains are excellent sources of nutrients for the diets of feedlot cattle, but have not been utilized to a large degree in heifer development programs. The goal of this trial was to evaluate the use of modified distillers grain with solubles stored for an extended period of time with growing and developing breeding heifers.