The present invention relates to a method for feeding non-castrated male pigs, wherein these pigs have a protein requirement that is 15.00 to 25.00% higher than pigs of the same age who do not belong to this subpopulation, wherein the feed has a content has a protein content between 15.00 and 20.00 m% and the additional protein requirement is met by addition of free amino acids to the feed.
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