The present invention relates to compositions and methods for preventing and treating osteochondrosis by administration of supplemental boron containing compounds to animals and humans. The supplemental boron containing compounds are provided in animal feed compositions or as supplements for animal feed. Also provided by this invention are animal feed compositions that are supplemented with boron containing compounds and which have reduced phosphorus content. The invention also provides a method for treating or preventing osteochondrosis in animals or humans by the administration of supplemental boron containing compounds. The invention also provides a method for decreasing the amount of phosphorus excreted by an animal, a method of increasing the efficiency of absorption of phosphorus by an animal, a method of reducing environmental phosphorus pollution by administering supplemental boron to the animal. The invention also provides a method of reducing pre-weaning mortality in an animal by feeding pregnant, nursing or lactating animals by administering supplemental boron containing compounds.
