Silage is an integral ingredient in the diets of high-producing dairy cows throughout the world. In North America, silages formulated into the diets of high-producing dairy cows are predominantly corn silage and alfalfa silage along with smaller usage of other forages such as small grain silage and grass silage. Silages can be one of the least expensive feedstuffs to include in dairy cow diets, therefore it can be advantageous to include as much forage into the lactating dairy cow diet if it does not limit intake and does not result in decreased milk production. Typically, diets with increasing forage NDF concentration decrease DMI attributed to greater forage NDF concentration and bulk density of the diet. While increased forage NDF concentration may decrease milk production, with proper diet formulation and the inclusion of high quality silages, milk production may be maintained and feed efficiency may be improved. Implementation of harvesting techniques such as increased cutting length can improve nutrient digestibility of the resulting silage. In addition, selection of forage varieties containing the brown midrib (BMR) gene results in silage with lower lignin, higher fiber digestibility, greater intake, and potentially higher milk production. Lower lignin alfalfa varieties are now available that may result in greater fiber digestibility and potentially improved production. Utilizing both BMR silages and lower-lignin alfalfa varieties into one diet may help push the upper limit of how much forage can be included while maintaining high milk production and improving feed efficiency.