please suggest some cattle feed for improve

For better milk and body condition, give a balanced dairy ration, not just grain. A lactating cow usually needs green fodder, dry roughage, concentrate, and mineral mixture together. As a general practice, use good green fodder, some dry straw, and a concentrate with about twenty percent protein for high yield cows. Add mineral mixture daily. If you want, I can help you plan the exact feed through the ration calculator.