NaturVet Grass Saver is a natural food supplement that helps diminish yellow urine spots on your lawn when fed to your dog on a daily basis. It is a combination of dl-Methionine, vitamins, biotin and yucca. This combination of the vitamins and amino acid helps metabolize the dog's food and diminish yellow spots on the lawn. Note: Do not administer to pets with severe liver, kidney, or pancreatic disease. Shipping weight: 3/4 lb.