i have 4 milking cow just need mineral mix power for increase milk production

Low milk yield with no other signs often improves with a good mineral mix and better feeding. Give a cattle mineral mixture daily as per the label, usually mixed in the concentrate or top-dressed on feed. Also keep clean water, green fodder, and enough energy feed, because mineral powder alone will not raise milk much. If the drop is sudden, check for mastitis or worm load. For a precise ration, use the feed calculator on Pashushala.