Top Prescription Diets for Dogs with Liver Disease and Selection Criteria

Liver HealthTop PicksMeongsiljang Veterinary Advisory Board

I’ll outline the criteria for selecting prescription diets for dogs with liver disease and recommend products such as Hill’s l/d and Royal Canin Hepatic, all based on veterinary evidence.

What Are Prescription Diets for Dogs with Liver Disease?

Prescription diet for dogs with liver disease

Prescription diets for dogs with liver disease are specially formulated under veterinary guidance to support the nutritional status and recovery of pets with compromised liver function. What truly sets them apart from regular dog food is their reduced sodium and copper content, along with highly digestible proteins that lessen the metabolic burden on the liver. However, protein isn’t simply restricted; in cases without hepatic encephalopathy, adequate protein is provided to prevent muscle loss. Dietary management plays a crucial role alongside medication in most liver diseases and is considered a cornerstone of treatment, especially for hepatic encephalopathy or copper-associated liver disease. Therefore, after diagnosis, it’s more beneficial for recovery to follow a tailored dietary plan in consultation with your veterinarian rather than continuing with regular dog food alone.

Prescription Diets Must Be Fed Only After a Veterinary Prescription

The ideal nutritional composition varies depending on the cause and stage of liver disease. If hepatic encephalopathy is present, it’s best to limit protein or switch to highly digestible plant-based or dairy proteins. However, if hepatic encephalopathy is absent, current guidelines recommend against restricting protein, even in cases of portosystemic shunts. Excessive protein restriction can actually lead to muscle loss and nutritional deficiencies. Please consult your veterinarian to choose the most appropriate product based on blood test results (ALT, AST, ALP, and bilirubin levels) and diagnostic findings. Selecting a prescription diet without professional guidance may have adverse effects.

5 Criteria for Choosing a Good Prescription Diet for Liver Disease

High-quality protein: Using highly digestible proteins, including plant-based and dairy proteins, can help reduce the ammonia burden on the liver in cases of hepatic encephalopathy.

Low sodium: Reducing sodium can assist in managing ascites (fluid accumulation in the abdomen) and edema.

Copper restriction: For dogs diagnosed with copper-associated liver disease, products with low copper content and enhanced zinc may be beneficial.

Zinc and liver-supporting ingredients: Zinc helps reduce copper absorption, and you may consider products that also contain liver-supporting components.

High digestibility: The less digestive burden there is, the fewer waste products the liver needs to process.

Criteria for selecting prescription diets for dogs with liver disease

Comparison of Prescription Diets for Liver Disease Available in Korea

Item	Hill's l/d	Royal Canin Hepatic	Specific CLD
Core design	Copper restriction and antioxidants	Low fat and copper restriction	High digestibility and low sodium
Dry product	True	True	True
Wet product	True	True	False
Copper restriction	True	True	True
Omega-3 enriched	True	False	True
Purchase method	Animal hospital prescription	Animal hospital prescription	Animal hospital prescription

All prescription diet foods can be purchased after a prescription is issued at the animal hospital. Product nutritional content may vary depending on manufacturer updates.

No. 1 Hill’s Prescription Diet l/d — The Standard for Liver Disease Prescription Diets

Hill’s l/d is the most widely prescribed diet for liver disease both domestically and internationally. It focuses on protecting liver cells by reducing copper content and enhancing zinc, vitamin E, and vitamin C. Highly digestible protein helps reduce ammonia production, while omega-3 fatty acids help alleviate liver inflammation. Available in both dry and wet forms, it is easy to use even for dogs with reduced appetites. It is frequently prescribed for dogs diagnosed with copper-associated liver disease or chronic hepatitis.

Puppies consuming prescription diet food for liver disease

No. 2 Royal Canin Hepatic — Minimizes Liver Burden with Low-Fat Formulation

Royal Canin Hepatic is a prescription diet specifically formulated with reduced fat content to lessen the liver’s burden in processing fats. Since the liver plays a key role in fat metabolism, lowering fat intake helps reduce overall stress on the organ. The formula also limits copper and uses highly digestible protein sources. Available in both dry and wet forms, it can be transitioned to or fed alongside other diets depending on your dog’s condition. It’s particularly suitable for dogs with fatty liver disease or concurrent gallbladder issues.

No. 3 Specific CLD — High Digestibility, Low Sodium European Veterinary Brand

Specific CLD is a prescription diet for liver disease from a Danish veterinary brand, available at select veterinary clinics in Korea. It focuses on managing ascites and edema by enhancing digestibility and reducing sodium content. It is fortified with sulfur-containing amino acids (methionine and cysteine) to support the liver’s detoxification processes. The product is primarily sold as dry food, so be sure to check with your clinic in advance to confirm whether it can be prescribed.

A veterinarian explaining prescription diet food for liver disease.

Please Follow This When Transitioning to a Prescription Diet

Switching abruptly from your pet’s current food to a prescription diet can cause digestive upset. Please transition gradually over 7–10 days by slowly decreasing the amount of the old food while increasing the prescription diet. If you plan to add any treats or supplements alongside the prescription food, be sure to consult your veterinarian first. Never feed toxic foods such as onions, garlic, or grapes.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

Do I need to feed prescription diet food for my pet’s entire life?

The type of liver disease and the course of recovery will determine the appropriate diet. If acute hepatitis has fully resolved, you can switch to a regular high-quality commercial diet. However, for chronic liver disease or copper-associated hepatopathy, long-term or lifelong feeding of a therapeutic diet is often necessary. Please have your veterinarian review blood test results every six months to assess whether the current diet should be continued.

My pet is on a prescription diet but has no appetite. What should I do?

Liver disease itself can cause a loss of appetite. You can stimulate your pet’s appetite by starting with wet (canned) food instead of dry kibble, or by gently warming the food to enhance its aroma. If your pet refuses to eat for more than two to three days, please visit a veterinary clinic immediately.

Can I mix prescription diet food with regular pet food?

Only mix a small amount during the transition period (7–10 days), and then feed the prescription diet exclusively. Mixing foods dilutes the nutritional composition of the prescription diet and reduces its copper-restricting effect.

Can I give nutritional supplements alongside a prescription diet for liver disease?

Supplements such as milk thistle (silymarin), SAMe, and zinc are known to be beneficial, but adding them to a prescription diet can cause nutritional imbalances. Please always consult your veterinarian to check for overlapping ingredients with the prescription diet before adding any supplements.

Can I stop the prescription diet once my pet’s liver values improve?

It’s best not to stop treatment just because the numbers have improved. Your veterinarian needs to make a comprehensive assessment to ensure the underlying condition is fully resolved. Stopping medication on your own can increase the risk of relapse.

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References

[1] Fascetti AJ, Delaney SJ. Applied Veterinary Clinical Nutrition, 2nd Ed. Wiley-Blackwell, 2012.

[2] Schaer M, Gaschen FP. Clinical Medicine of the Dog and Cat, 4th Ed. CRC Press, 2022.

[3] Webster CRL. Hepatobiliary disease. In: Ettinger SJ, Feldman EC, Côté E, eds. Textbook of Veterinary Internal Medicine, 8th Ed. Elsevier, 2017.