A conceptual approach to optimal nutrition of brood mares.

The research article highlights the relationship between the nutritional demands of breeding mares and their output, stressing how optimal nutrition can affect the racing performance of their offspring. It also delves into the varied nutritional needs during different stages of reproduction and highlights specific considerations for older breeding mares.

Conceptual Approach to Optimal Nutrition

• This section of the research presents the idea that, unlike other domestic livestock, brood mares have unique and high nutritional demands. It suggests that the nutrition of a brood mare has a direct influence on its reproductive mechanism and overall performance.
• The authors propose that the deficient performance in racing progeny from mares over 10 years of age may be due to suboptimal nutrition in the mother. This idea presents an opportunity to explore potential dietary alterations that may enhance the performance of racing progeny.

Minimal and Optimal Nutrient Requirements

• The paper contrasts minimal nutrient requirements, which refer to the least amount of nutritional input necessary to sustain basic life functions and maintain health, with optimal nutrient requirements. The latter denotes the ideal nutritional input that not only covers the basic needs but also ensures peak performance and health of the mare.

Nutrient Partitioning: Updating Hammond’s Concept

• The research reintroduces Hammond’s concept of nutrient partitioning, which explores how nutrients are distributed between a pregnant or lactating mare and its offspring (conceptus)/mammary gland. This partitioning delves into how altering a mare’s diet can impact foal development and growth.

Nutritional Requirements during Gestation and Lactation

• This section discusses the specific nutritional needs of brood mares during pregnancy and lactation period. Nutrition requirements change during these stages, with energy and nutrients often being in higher demand.

Special Considerations for Aged Brood Mares

• The paper sets apart a special section to discuss the care and nutritional considerations needed for aged brood mares, as their nutritional needs may change and they may require special attention.