GNF is a combination of minerals, amino acids and a prebiotic which have a role in general metabolism and are required for normal feed conversion GNF is a mineral feed that is a combination of minerals, amino acids, and a prebiotic which have a role in general metabolism and are required for normal feed conversion. It should be used to complement the feed of horses. It is suitable for feeding: To maintain digestive function. To horses with depressed appetites, weight loss, or exhibiting stable vices such as cribbing or wind sucking. GNF, an effective Prebiotic contains: Calcium & Magnesium. High Concentration of Glutamine Peptides & Threonine. Seaweed Extract (Laminaria Hyperborea). Instructions for Proper Use: GNF should be added to the normal feed ration. All Horses: Feed 50 g twice daily. Foals, Yearlings & Ponies: Feed 25 g twice daily.