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  1. Nutritional Requirements of Horses
  2. Horse Feed and Dietary Supply Calculator
Vitamins, Minerals and Protein and Fly Control in Cattle Nutrition

Knowledge of nutrient constraints and limitations of the suggested equations and models is essential for the proper use of this program in determining the nutrient requirements of specific horses. Because of the many variables involved and judgments that must be made in choosing inputs and interpreting outputs, the NRC makes no claim for the accuracy of this software in predicting the requirements for individual horses in specific situations.

The user is solely responsible for the risk of use. Careful review of the information presented in the "Nutrient Requirements of Horses" will assist users in making appropriate judgments in the use of this program. This program requires users to enter specific information such as current body weight, expected mature body weight, month of gestation for pregnant mares , months of age growing horses and months of lactation lactating mares.

For horses at maintenance, the user must choose from the low, average or high categories. Similarly, for exercising horses, the user must choose from four levels of work load.

Who are the NRC?

Explanations of these categories of maintenance and work can be found in the "Nutrient Requirements of Horses". This program calculates nutrient requirements in amounts per day. The program will also calculate the dietary supply of several nutrients if the user enters information on the amounts of specific feeds included in the ration. Feed composition data in the feed library of this document were obtained from other publications such as the "Nutrient Requirements of Beef Cattle", "Nutrient Requirements of Swine" and "Nutrient Requirements of Dairy Cattle".

Nutritional Requirements of Horses

Complete composition data for many feeds in the feed library were not available, therefore, the computer program calculates only the amounts of DE, CP, Ca, P, Na, Cl, K and lysine provided by the dietary ingredients. Unfortunately, the feed library does not contain lysine values for many feeds particularly forages , therefore the estimated amount of lysine in the dietary ingredients may be underestimated by the "dietary supply" component of the program.

Title Page. Animal Specification. Dietary Supply.

Proper formulation of diets for horses depends on adequate knowledge of their nutrient requirements. These requirements depend on the breed and age of the horse and whether it is exercising, pregnant, or lactating.

Horse Feed and Dietary Supply Calculator

A great deal of new information has been accumulated since the publication 17 years ago of the last edition of Nutrient Requirements of Horses. This new edition features a detailed review of scientific literature, summarizing all the latest information, and provides a new set of requirements based on revised data. Also included is updated information on the composition of feeds, feed additives, and other compounds routinely fed to horses.