Prior engaging in home making of concentrates a farmer should be aware of nutritional require-ments of their livestock. (400 kg) Head per day Unit Cows lacta-tion and after weaning Lactating cows first 1/2 of lacta-tion Dry pregnant cows 2 months before calving Heifer 1 month, 40 kg and growth 650 g/day Feed unit-- 6.70 8.30 6.40 2.30