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Corn silage represents a mixture of highly digestible, energy-dense grain and a poor quality forage (stover). The value of altering the grain to stover ratio through agronomic and harvesting strategies has been recognized for some time, however many of these practices have been applied to hybrids selected primarily for grain yield and adapted for harvest as silage. Although the feeding value of specific corn hybrids for silage production, such as brown midrib corn, has also been recognized the earlier available hybrids were lower yielding and therefore, less acceptable than conventional hybrids. Recently there is increased awareness of the potential to improve milk production, and milk per acre, through improved selection and use of specialty corn hybrids for silage production. These hybrids include selection for reduced lignin content, increased leaf to stem ratio, high starch content, high oil content and increased protein content. Performance of livestock fed corn hybrids that carry genes for insect resistance (Bt-gene) or herbicide tolerance (Roundup Ready), although not unique for silage production, are also of interest.