Producers must be aware of daily changes in a cow's feed requirements if they want to wean calves from at least 90 per cent of cows exposed to the bull. For instance, cows in the last third of pregnancy or those producing milk have special needs. If these needs are not met, reproduction is the first body function that is sacrificed. This document describes the effect of deficiencies and imbalances of both macro and micro nutrients. Energy Energy is probably the most important nutritional consideration in beef cattle production.
Animals require energy to grow and to keep the body functioning.
Cows need energy to maintain milk production as well as to initiate and maintain pregnancy. Carbohydrates and fats are the primary source of energy in the diet. Besides being a source of energy, carbohydrates are building blocks for other nutrients. The excess energy in a diet is deposited as fat, which provides insulation and protection for the body. Energy in the diet must meet the needs of production and in all animals there is a priority for nutrient use.