Hill's Prescription Diet l/d Canine is a suitable food for puppies and adult both. It is a dietetic feed for the nutritional management of dogs formulated to support liver function in the case of chronic liver insufficiency and for the reduction of copper in the liver. Hill's Prescription Diet l/d Canine Food provides Adequate energy intake to meet the needs of an adult dog without overloading the stomach. It reduces Hepatic encephalopathy is a decline in brain function that occurs as a result of severe liver disease.