The main ingredients of grass, hay, and whole plant silage are the principal ones. This is the main ingredient for cattle feed. In summer, a milk cow can consume between 70-140 kg of grass per daily, while in winter she will receive approximately. 30 kg of hay (hay has less water so it is lighter).
Cattle will also receive approximately. 2kg of grain and some protein feed per day, or equivalents made with sugar beet residues, orange zestss, etc.
The exact amounts depend on the age, size, use (milk cows or beef cattle), and if she is lactating, whether or not.