Magnesium bullets.
D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002118:Calcium / Q000097:blood; D002417:Cattle; D002418:Cattle Diseases / Q000517:prevention & control*; D005308:Fertilizers; D008274:Magnesium / Q000097:blood / Q000627:therapeutic use*; D008275:Magnesium Deficiency / Q000517:prevention & control; D009584:Nitrogen; D013746:Tetany / Q000517:prevention & control / Q000662:veterinary*
D005308:Fertilizers; D008274:Magnesium; D009584:Nitrogen; D002118:Calcium