Calciumphosphorus and vitamin powder supplement for horses. Osteo Form is used as an aid in the prevention of dietary deficiencies of calcium, phosphorus and vitamins A and D. Feeding Directions: To aid in the prevention of dietary deficiencies, give 1 to 3 slightly rounded tablespoonfuls to foals and 3 to 5 tablespoonfuls to yearlings and adults each day for as long as indicated. Preparation: Osteo Form may be added to the daily ration or mixed with milk and water. To facilitate proper adhesion of Osteo Form to the ration, slightly moisten the grain with water or liquid supplement. When using Osteo Form as a maintenance dietary supplement, calcium and phosphorus from other food sources should be considered.