The food requirements of cattle and poultry birds vary according to the age, health, nature of work and special conditions, like lactation period.
1. The optimal food requirements of a cattle can be worked out, by studying the internal structure and functioning of the rumen and nutritional quality of their feeds and fodder. The milk yield of an animal is largely determined by the kind of feed given to it.
2. A calf needs more food and nutrition than an old cow.
3. The feed of poultry birds also needs essential nutrients like carbohydrates, proteins and minerals. The feed for larger poultry farm contains mashed cereals, like bajra, wheat and maize, rice, beans and groundnut cake.