CAMBRIDGE, England — In March, the European Commission announced plans to reform its regulations on organic production and certification. For organic livestock farmers, this will include a provision to make animal feed 100 percent organic. The commission’s change will give farmers better access to organic certification and build consumer confidence, which has been shaken by loose regulations. For instance, in some cases it has been legal for farmers to farm both organic and conventional products on the same site, which means that organic consumers may be indirectly funding nonorganic products. This creates confusion in the organic marketplace, which can lead to mistrust and damage the integrity of the organic brand.