Nutrient requirements are based on mature body weights. To determine the daily nutrient requirements of your horse, follow these simple steps:

1. From ONE of the following drop down menus, select either a) the MATURE body weight that most closely approximates the weight of your horse in pounds (lbs.), b) the MATURE body weight in kilograms (kg) or c) the breed.
2. Select either Mature or Growing horse. When you select "growing horse", the system will automatically retrieve the requirements table for a growing horse that will eventually attain the specified mature body weight.
3. Submit request.

Body Weight, lbs.
Body Weight, kg
Mature Growing


The nutrient requirement tables are from the National Research Council (NRC) 1989 Nutrient Requirements for Horses. The requirements are based on the latest documented research. All of the requirement values in the tables are the total amount of each nutrient required per day. For example, an 1102 lb. horse at maintenance requires 656 grams of crude protein (CP), 23 grams of lysine (Lys), 20 grams of calcium (Ca), etc.. Your analysis report provides results in grams/pound or grams/kilogram so that you can calculate the nutrient contribution from the analyzed feed.