The problem of marking the composition of Feed label

Recently, I have seen the feed label of a certain factory, and the "crude protein" index item in the guarantee value of product composition analysis is expressed as a range value. Please advise whether this meets the requirements of feed label. The content of crude protein, crude fiber, crude fat, crude ash, total phosphorus, calcium, salt, moisture and various amino acids is expressed in mass fraction (%). A1.2 the content of trace elements is expressed as the mass of an element per kilogram of feed (e.g. mg or μ g). A1.3 the content of toxic and harmful substances is expressed by the mass or number of toxic and harmful substances per kilogram of feed (e.g. mg, μ g or the number of bacteria). A1.4 the content of drugs and vitamins, expressed in terms of the mass of drugs or vitamins per kilogram of feed, or in terms of the biological potency of drugs (e.g. mg, μ g or IU). All use this index-why not? controlling the protein limit well will help to save protein resources and reduce N emissions. -- Yes-- I used to only mark the lower limit. Learn-- it will gradually be marked as this range in the future. Is the feed label a guaranteed value for standard analysis? Is the elevation better or the elevation lower? [ts] the dreamer chased the dream at 10:16 in 2009-12-6 to add the following [/ ts] and what is the best amount of pregnant sow protein? Is it 12 or 14? Which one is better?