Improved, valine-supplemented sow lactation diets are provided which increase litter and weaning weights, particularly in the case of high producing sows. The diets of the invention include from about 12-30% by weight of total protein (e.g., from corn and soy), a total lysine content of about 0.75% by weight, and sufficient valine to give a valine:lysine ratio of at least about 0.83:1.
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