For the production of quality feed, it is of utmost importance that all the ingredients and micro ingredients (vitamins, additives and trace elements) are measured in weight with high precision so that the desired percentage of each can be ensured in final feed. As the no. of ingredients and volume of production increases, it necessitates that the automatic weighing of all the ingredients is carried out. It generally consists of two set of proportioning bins with individual weighing hopper scale, one for major ingredients and second for micro ingredients. There may be any no. of bin from 2 to 20 for each set with suitable capacity and higher accuracy of weighing is required for micro ingredients. Auto weighing of liquids, fat, and oil can also be incorporated to the mixer.