Pork Liver vs. Beef Liver Treats: Benefits and How to Choose

What are the benefits of liver treats?

A food source of protein and micronutrients

Laboratory research on beef liver and USDA food-composition data for pork liver document protein, iron and vitamin B12. Liver also supplies preformed vitamin A. These are ingredient facts; the amount in a finished treat depends on its composition, processing and serving size.[1][2][3]

Protein supplies amino acids used to build and maintain body tissues. Vitamin A has normal roles in vision and maintaining tissues such as skin and the lining of the gut. These functions explain why nutrients belong in a balanced diet; they do not establish that extra liver improves vision, skin or health in a pet whose needs are already met.[1]

A reward your dog may want to work for

AKC includes liver among potentially high-value food rewards. The useful benefit is practical: a food your dog enjoys can reinforce a behavior you are teaching. Preference varies, so try a small, appropriate piece rather than assuming one protein wins.[4]

A short ingredient list you can understand

For the two Mizusu products below, the ingredient list identifies the animal and the organ. That makes it straightforward to tell what you are offering. It does not tell you the exact vitamin content, whether your pet will like it, or whether it fits a prescribed diet.

What does the research actually show?

Different kinds of evidence answer different questions. These studies help explain what liver contains and how dogs respond to food rewards; they do not establish a health advantage for one Mizusu treat over the other.

• Beef liver: measured nutrient composition. Fuerniss and colleagues’ 2024 study analyzed raw beef offal from U.S. suppliers using validated laboratory methods. Liver samples contained protein, vitamin A, B12, iron and copper. This supports describing beef liver as a source of those nutrients. The research was funded by the Beef Checkoff and studied food composition, not health outcomes in pets.[2]
• Pork liver: a separate laboratory study. Seong and colleagues’ 2014 analysis of pork organs from South Korea measured protein, amino acids, vitamins and minerals. Pork liver contained protein, vitamin A, several B vitamins and iron. Its vitamin panel did not include B12; the pork-liver B12 statement above comes from USDA data. These were raw organs, not finished freeze-dried treats.[10][3]
• Food rewards: preferences differ. A 2018 experiment with 16 pet dogs used sausage, cheese and a commercial liver treat. In its initial preference test, four dogs favored the liver treat, seven sausage and five cheese. The subsequent task examined constant versus varied rewards. This small study supports checking your own dog’s preferences; it did not compare pork liver with beef liver.[13]

What these sources cannot tell us: whether either liver treat improves skin, immunity or other health outcomes in an already well-fed pet, or the exact micronutrients in a particular bag. The composition studies were designed around human food data, so their human daily-value percentages are not pet feeding targets. Their different samples and methods also do not provide a controlled pork-versus-beef comparison.

Pork liver vs. beef liver: compare the bag, not just the animal

These figures come from Mizusu’s final 4 oz package labels, checked September 15, 2026. They describe these two products, not every pork- or beef-liver treat. Always check the package you have for current information.

The clearest portioning difference is energy density. The listed values convert to about 3.28 kcal per gram for beef and 4.48 kcal per gram for pork. For equal weighed portions of these products, the pork version contributes more calories. That helps with portion planning; it is not a health ranking.

Minimums are not exact measurements. A 4% fat minimum does not mean the product contains exactly 4% fat, nor does it establish suitability for a low-fat medical diet. Do not rank actual protein or fat amounts by minimum guarantees alone. Ask for typical nutrient analysis when your veterinarian needs a more precise comparison.[5]

Fresh-liver numbers are not freeze-dried-treat numbers. Raw liver in the cited research and food databases contains much more water than these dried products. Do not copy its per-100-gram vitamin or mineral values onto a dried treat. The labels above do not quantify vitamin A, B12 or iron, so this guide does not assign those amounts to Mizusu products.[2][3][5]

Plan calories first, then divide the rewards

WSAVA advises keeping treats below 10% of a dog’s daily calories. AAHA also flags more than 10% from treats and other incomplete foods as a nutritional risk. Count all extras together, including toppers and food used for pills. Your veterinarian may set a lower allowance. This general calorie guideline is not a liver-specific vitamin safety limit.[11][6][7]

Use calories, not a percentage of food weight. Ten percent of the grams or cups in the bowl is not the same as 10% of daily calories. Start with your dog’s agreed daily feeding plan, including meals and all extras; the treat allowance is part of that total, not an addition to it.[15]

For irregular pieces, use the package’s kcal/kg figure and a suitable kitchen scale: calories = grams × kcal/kg ÷ 1,000. A label’s per-treat figure is a convenient estimate, not a promise that every chunk weighs the same.

Write down the amount set aside for the whole day, who may give it, and what other extras are planned. Ask your veterinarian to check the overall diet if liver or vitamin A also comes from other treats, a homemade recipe or supplements. Repeated excess vitamin A can cause harm; more nutrient-dense food is not always better.[7]

How to use liver treats during dog training

Prepare a measured portion before the session. Choose an appropriate treat using the dietary checks below, and follow the raw-treat handling guidance if using freeze-dried raw liver.

1. Use part of the planned meal when it works. Reserve some of your dog’s measured daily complete food for easy practice or a food-search game. Food moved from the meal container to training has already been counted: do not add a second serving to the bowl afterward. Keep the usual feeding schedule and discuss any changes needed for puppies or pets on a medical plan.[14][15][16]
2. Save favorite rewards for harder tasks. If liver is an approved favorite, use small, comfortably eaten pieces for new skills or more distracting settings. Use regular food for familiar tasks when your dog finds it rewarding. There is no need for every successful repetition to earn a whole liver chunk.[4]
3. Reward the behavior, then keep practice brief. For example, give the reward when your dog completes the sit you asked for. Once a skill is reliable, sometimes reward with a game, praise or affection your dog enjoys. Finish a short, successful session and record the food used so another handler does not repeat the allowance.[14]

Do not solve a treat-heavy day by skipping a meal. Liver cannot replace the balance of nutrients in complete food. If frequent training regularly exceeds the plan, ask the veterinary team to help allocate meals, training food and extras together.[11][15]

A practical way to choose

1. Start with dietary restrictions

   If your pet has a prescribed diet, a known food reaction or a condition requiring nutrient limits, ask your veterinarian about the exact product first. Neither pork nor beef is automatically suitable. A single ingredient does not override the care plan.[6] Our grooming guide explains how to communicate approved rewards to another handler.

2. Compare the portion you will actually use

   For these Mizusu labels, equal grams of beef use fewer calories than equal grams of pork. You can also use a smaller portion of the pork product. Choose the amount within your pet’s agreed feeding plan instead of comparing handfuls.

3. Let preference guide the reward

   If both fit the plan, see which your dog enjoys in the setting where you train. A favorite reward at home may be less motivating outdoors. Keep trials small and sessions manageable.[4]

4. Make repeat use easy to track

   Keep the original bag, note the product and daily portion, and tell other family members what has already been given. Save the lot and best-by details for questions or recall checks.[9]

What changes if the treats are for a cat?

Check that the product is labeled for cats. Both Mizusu labels here say dog and cat treats, but a shared product does not imply the same serving size.

Cats need preformed vitamin A, which liver can supply, but are more susceptible than dogs to vitamin A excess. Their main diet should already meet their nutritional needs. Discuss a regular liver-treat portion with your veterinarian, and do not use liver to replace complete cat food.[1][7]

WSAVA’s cat guidance also recommends keeping treats below 10% of daily calories, choosing a suitable size and shape, and supervising feeding. Its example calorie allowances apply to average healthy adult cats in ideal body condition; your cat’s needs may differ. Ask the veterinary team for an individual allowance.[12]

Liver treats are food rewards, not dental care. For that separate routine, see our guide to brushing a cat’s teeth.

Freeze-dried raw treats still need careful handling

Freeze-dried does not mean cooked or sterile. CDC does not recommend raw pet food or treats: freezing, drying and freeze-drying do not kill all germs. Both the pet and people handling the food can be exposed. Ask your veterinarian about cooked alternatives, especially where household members are at greater risk of serious infection.[8]

If you use these products, follow the package instructions. Wash hands and clean feeding equipment; keep treats away from human food-preparation areas. Close the bag tightly, store it as directed, and keep its identifying information. Our food-storage checklist explains how to retain lot details when packing supplies.[8][9]

If your pet becomes unwell after a treat, stop offering it and contact your veterinarian. Keep the packaging and tell the clinic what was eaten and approximately how much.[9]