What the feed should I give her for giving more milk?

Low milk is often from weak feeding after calving. Give her green fodder, good dry fodder, and a balanced concentrate mix in small meals. Add mineral mixture and salt daily, and keep clean water always in front of her. If she is a high-yield buffalo, feed more energy rich concentrate after milking. If milk is still low after a few days, or she stops eating, get her checked for mastitis or fever.