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Ingredient file // Animal protein

Liver

Real organ protein, with an unnamed source

Liver is an animal organ used in pet food for protein, minerals and flavor. It also contributes vitamin A and copper, so the amount matters in a balanced recipe. A plain “liver” entry does not tell you which animal supplied it.

Role in the food Supporting nutrient
Liver
What it is
The liver organ from a slaughtered animal, supplied as an ingredient for pet food.
Made from
Livers from slaughtered animals
Main job
Animal protein and flavor
Typical amount
Generally below 5 to 10% of diet dry matter
Watch for
Extra vitamin A or copper in restricted diets
Not the same as
Liver meal

Straight answer

Is Liver safe for dogs?

Accept the organ, check the whole recipe

Read liver as a real source of protein and flavor, then check the named meats around it and the food's nutritional adequacy statement. List position shows ingredient weight, not vitamin A or copper content. Ask the maker for the animal source if your dog has a diagnosed food allergy.

Why it is in the food
Animal protein and flavor

Our read // In our catalog

In 1 of every 30 foods we track

Share of foods that list it

3%

107 of the 3,205 foods with an ingredient list on file, from 8 brands. 94 wet dog food, 12 dry dog food, 1 dog food topper.

Each square is 1% of the catalog

Where it sits on the label

Median position 3. In the top five of 91 foods, so it is usually a main ingredient.

Top five List position, heaviest first

Above the salt

100%

Almost always listed before the salt, so there is more of it than a pinch.

Price per lb

Foods with it $4.55
All foods $3.25

Median of the cheapest bag price across 14 priced foods, 40% above the catalog. The price is the food's, not the ingredient's.

Who leans on it

68%

of the foods that list it are from Purina. 8 brands use it in total.

What it is

How it is made

The meat industry separates livers during slaughter. Some enter the pet food supply as fresh or frozen organs. For wet food, manufacturers grind and blend them with other ingredients before sealing and heating the cans.4,5,8,10

  1. 01 // Source Animal livers Livers are separated from carcasses during slaughter and sold on as byproducts rather than discarded.
  2. 02 // Process Held cold A pet food study used frozen, boxed beef liver that was thawed before grinding.
  3. 03 // Process Ground and blended Wet food makers blend animal ingredients with water, fat, vitamins and minerals before filling cans.
  4. 04 // Output Liver for wet food Fresh or frozen liver enters the recipe; sealed cans are then heated under pressure.

What is in it

Composition, dry matter

66-70

% protein

The calculated range for sampled calf, beef and lamb livers after excluding water. Liver supplies substantial protein, but a label does not reveal its share.

Crude protein 65.8-70.3%4
Crude fat 12-17.9%4
Copper 237-400 mg/kg4
Ash 4.3-4.8%4
Vitamin A 741 mg/kg11

The protein, fat, copper and ash ranges come from sampled calf, beef and lamb livers, converted from wet tissue to dry matter. The vitamin A figure is one separate lamb liver batch, not a typical level.4,11

Why it is in the bag

Adds protein, minerals and flavor in modest amounts

  1. Main nutrition
  2. Supporting nutrient
  3. Does a job
  4. Mostly filler

Liver adds real protein: sampled livers were about two thirds protein on a dry matter basis. An industry project says inclusion is generally kept below 5 to 10% of diet dry matter because of vitamin A, so it likely tops up the main meats' protein rather than carrying it. Labels rank by weight, water included, so a high spot on a wet food list overstates its dry share. It also adds flavor and uses slaughter output.4,6,10,11,12

  1. 01

    Adds protein and minerals

    Liver contributes animal protein, iron and copper. Its nutrient contribution depends on how much the manufacturer uses and what else is in the complete recipe.4

  2. 02

    Adds savory flavor

    Manufacturers use liver for taste. Evidence from hydrolyzed liver powder shows that processing and the rest of the recipe affect whether dogs prefer the finished food.1,12

  3. 03

    Uses slaughter output

    Selling organs into pet food gives meat processors another market for material separated at slaughter and reduces disposal costs.4,10

How much An industry project says ordinary liver inclusion is generally kept below 5 to 10% of dietary dry matter because of vitamin A.11

Our read // The claims

What the evidence supports

Strong: controlled studies in dogs agree. Some: small or mixed dog data. Thin: mechanism or lab work only. None: nothing, or the evidence points the other way.

  1. Brands say

    Liver adds real animal protein

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    Protein accounted for 65.8 to 70.3% of dry matter in sampled calf, beef and lamb livers. Liver is a protein source. That range does not tell you the source or amount in a particular food.4

  2. Brands say

    Liver always makes food taste better

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    A supplier reported that 85% of dogs chose kibble coated with 2% hydrolyzed chicken liver powder first. A separate 22-dog comparison found no preference for a liver powder diet. Neither test proves plain liver always improves a food.1,12

  3. Vets say

    Too much liver causes vitamin A poisoning

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    An MLA lamb liver batch began at 741 mg/kg vitamin A on a dry matter basis, and its report advises limited inclusion. Merck describes toxicity after large exposures. Risk depends on total intake, including regular liver treats.9,11

  4. Brands say

    Extra liver improves eyesight and immunity

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    Liver supplies vitamin A, but a 45-day trial with 12 healthy dogs found no immune advantage from a hydrolyzed chicken liver diet. The trial did not test eyesight. Nutrient content alone does not prove a benefit from extra liver.2,11

  5. Owners say

    Plain liver on the label means beef

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    AAFCO requires a named species only when meat or meat byproducts come from animals other than cattle, pigs, sheep or goats. Even read under that rule, plain liver could come from any of the four. Nothing on the label points to beef alone.6

Straight answers

What owners ask

  1. Q01

    Is it just filler?

    No

    Liver supplies animal protein and minerals, and manufacturers also use it for flavor. The sampled livers were roughly two-thirds protein on a dry matter basis. The ingredient has a nutritional job even when its species is unstated.4,12

  2. Q02

    Which animal supplied the liver?

    Not stated

    A plain liver entry names the organ, not the animal. AAFCO requires a declared species only when meat or byproducts come from outside cattle, pigs, sheep and goats. If species matters for a food reaction, ask the maker.6

  3. Q03

    Does liver replace a balanced diet?

    No

    Liver adds protein and minerals, but it cannot tell you whether the whole food meets a dog's needs. Check the nutritional adequacy statement. Regular liver treats also add vitamin A and copper beyond the complete food.4,6,9,11

Who uses it

Brands, best sellers and the company it keeps

Top brands, by foods that list it

  1. Purina 73 / 186
  2. Evanger's 11 / 30
  3. Orijen 10 / 25
  4. Earthborn Holistic 4 / 28
  5. Gentle Giants 3 / 8
  6. Acana 3 / 23
  7. Against the Grain 2 / 5
  8. Blue 1 / 186

Foods that list it / all the brand's recipes we track.

Amazon best sellers that list it

  1. #53 Orijen Original Grain-Free Dry Dog Food

Rank on Amazon's dog food best seller list, checked October 2026.

Usually listed with, share of the foods that list it

  1. Chicken 78%
  2. Meat By-Products 45%
  3. Wheat Gluten 38%
  4. Potassium Chloride 37%
  5. Zinc Sulfate 37%
  6. Carrots 36%
  7. Ferrous Sulfate 36%
  8. Copper Sulfate 36%
  9. Manganese Sulfate 36%
  10. Minerals 35%
  11. Potassium Iodide 35%
  12. Sodium Selenite 32%

On the shelf

Foods that list Liver

107 foods in our catalog list it. These 60 list it highest on the label.

Show 48 more
Purina Pro Plan Adult 7+ Senior Complete Essentials Chicken & Rice Entrée Classic Wet Dog FoodPurinaPurina Pro Plan Adult 7+ Senior Complete Essentials Chicken & Rice Entrée Classic Wet Dog FoodWet // No. 2 on the labelPurina Pro Plan Sport Puppy High Protein Beef & Rice Entrée Classic Wet Dog FoodPurinaPurina Pro Plan Sport Puppy High Protein Beef & Rice Entrée Classic Wet Dog FoodWet // No. 2 on the labelPurina Beneful Chicken & Carrots Loaf Wet Dog FoodPurinaPurina Beneful Chicken & Carrots Loaf Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Weight Management Chicken Rice Gravy Wet Dog FoodPurinaPurina Pro Plan Weight Management Chicken Rice Gravy Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Weight Management Beef Rice Gravy Wet Dog FoodPurinaPurina Pro Plan Weight Management Beef Rice Gravy Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Weight Management Turkey Rice Gravy Wet Dog FoodPurinaPurina Pro Plan Weight Management Turkey Rice Gravy Wet Dog FoodWet // No. 3 on the labelPurina Beneful Freshly Prepared Blends Lamb Wet Dog FoodPurinaPurina Beneful Freshly Prepared Blends Lamb Wet Dog FoodWet // No. 3 on the labelPurina Beneful Kitchen Creations Chicken & Veggies Wet Dog FoodPurinaPurina Beneful Kitchen Creations Chicken & Veggies Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Puppy Small Breed Chicken & Brown Rice Entrée Wet Dog FoodPurinaPurina Pro Plan Puppy Small Breed Chicken & Brown Rice Entrée Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Adult Large Breed Beef & Rice Entrée In Gravy Wet Dog FoodPurinaPurina Pro Plan Adult Large Breed Beef & Rice Entrée In Gravy Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Adult Large Breed Chicken & Rice Entrée In Gravy Wet Dog FoodPurinaPurina Pro Plan Adult Large Breed Chicken & Rice Entrée In Gravy Wet Dog FoodWet // No. 3 on the labelPurina Beneful Chicken & Peas in Gravy Wet Dog FoodPurinaPurina Beneful Chicken & Peas in Gravy Wet Dog FoodWet // No. 3 on the labelPurina Beneful IncrediBites Small Breed Loaf with Real Salmon Wet Dog FoodPurinaPurina Beneful IncrediBites Small Breed Loaf with Real Salmon Wet Dog FoodWet // No. 3 on the labelPurina Beneful IncrediBites Small Breed Loaf with Real Beef Wet Dog FoodPurinaPurina Beneful IncrediBites Small Breed Loaf with Real Beef Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Complete Essentials Adult Chicken & Vegetables Entrée Slices In Gravy Wet Dog FoodPurinaPurina Pro Plan Complete Essentials Adult Chicken & Vegetables Entrée Slices In Gravy Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Complete Essentials Adult Beef & Rice Entrée Classic Wet Dog FoodPurinaPurina Pro Plan Complete Essentials Adult Beef & Rice Entrée Classic Wet Dog FoodWet // No. 3 on the labelEarthborn Holistic Grain Free Classics K95 Duck Wet Dog FoodEarthborn HolisticEarthborn Holistic Grain Free Classics K95 Duck Wet Dog FoodWet // No. 3 on the labelEarthborn Holistic Grain Free Classics K95 Lamb Wet Dog FoodEarthborn HolisticEarthborn Holistic Grain Free Classics K95 Lamb Wet Dog FoodWet // No. 3 on the labelEarthborn Holistic Grain Free Classics K95 Chicken Wet Dog FoodEarthborn HolisticEarthborn Holistic Grain Free Classics K95 Chicken Wet Dog FoodWet // No. 3 on the labelEvanger’s Super Premium Lamb & Rice Dinner Wet Dog FoodEvanger'sEvanger’s Super Premium Lamb & Rice Dinner Wet Dog FoodWet // No. 3 on the labelEvanger’s Super Premium Beef Dinner for Dogs Grain-Free Wet Dog FoodEvanger'sEvanger’s Super Premium Beef Dinner for Dogs Grain-Free Wet Dog FoodWet // No. 3 on the labelEvanger’s Grain Free; Super Premium Chicken Dinner Wet Dog FoodEvanger'sEvanger’s Grain Free; Super Premium Chicken Dinner Wet Dog FoodWet // No. 3 on the labelOrijen FreshPrey Turkey, Salmon & Pork Recipe Grain-Free Wet Dog FoodOrijenOrijen FreshPrey Turkey, Salmon & Pork Recipe Grain-Free Wet Dog FoodWet // No. 3 on the labelPurina Beneful Freshly Prepared Stews Chicken Dinner with Carrots and Rice in Gravy Wet Dog FoodPurinaPurina Beneful Freshly Prepared Stews Chicken Dinner with Carrots and Rice in Gravy Wet Dog FoodWet // No. 3 on the labelPurina Beneful Freshly Prepared Classics With Lamb, Chopped Kale and Carrots Pate Wet Dog FoodPurinaPurina Beneful Freshly Prepared Classics With Lamb, Chopped Kale and Carrots Pate Wet Dog FoodWet // No. 3 on the labelPurina Beneful Freshly Prepared Classics With Salmon, Green Beans and Spinach Pate Wet Dog FoodPurinaPurina Beneful Freshly Prepared Classics With Salmon, Green Beans and Spinach Pate Wet Dog FoodWet // No. 3 on the labelPurina Beneful Freshly Prepared Classics Chicken Dinner with Carrots and Peas Pate Wet Dog FoodPurinaPurina Beneful Freshly Prepared Classics Chicken Dinner with Carrots and Peas Pate Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Complete Essentials Grain Free Adult Turkey & Sweet Potato Entrée Classic Wet Dog FoodPurinaPurina Pro Plan Complete Essentials Grain Free Adult Turkey & Sweet Potato Entrée Classic Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Sensitive Skin & Stomach Salmon & Rice Entrée Classic Wet Dog FoodPurinaPurina Pro Plan Sensitive Skin & Stomach Salmon & Rice Entrée Classic Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Complete Essentials Adult Chicken & Rice Entrée Classic Wet Dog FoodPurinaPurina Pro Plan Complete Essentials Adult Chicken & Rice Entrée Classic Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Sensitive Skin & Stomach Beef & Oat Meal Entrée Classic Wet Dog FoodPurinaPurina Pro Plan Sensitive Skin & Stomach Beef & Oat Meal Entrée Classic Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Puppy Starter Chicken Entrée Ultra Soft Mousse Wet Dog FoodPurinaPurina Pro Plan Puppy Starter Chicken Entrée Ultra Soft Mousse Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Puppy Sensitive Skin & Stomach Salmon & Rice Entrée Classic Wet Dog FoodPurinaPurina Pro Plan Puppy Sensitive Skin & Stomach Salmon & Rice Entrée Classic Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Adult 7+ Sensitive Skin & Stomach Salmon & Rice Entrée Classic Wet Dog FoodPurinaPurina Pro Plan Adult 7+ Sensitive Skin & Stomach Salmon & Rice Entrée Classic Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Puppy Grain Free Chicken Entrée Classic Wet Dog FoodPurinaPurina Pro Plan Puppy Grain Free Chicken Entrée Classic Wet Dog FoodWet // No. 3 on the labelPurina Pro Plan Sport Adult High Protein Beef & Bison Entrée Classic Wet Dog FoodPurinaPurina Pro Plan Sport Adult High Protein Beef & Bison Entrée Classic Wet Dog FoodWet // No. 3 on the labelPurina ONE Chicken & Brown Rice Brain & Heart Wet Dog FoodPurinaPurina ONE Chicken & Brown Rice Brain & Heart Wet Dog FoodWet // No. 3 on the labelPurina ONE True Instinct Tender Cuts in Gravy Chicken & Duck Wet Dog FoodPurinaPurina ONE True Instinct Tender Cuts in Gravy Chicken & Duck Wet Dog FoodWet // No. 3 on the labelPurina ONE Chicken & Brown Rice Wet Dog FoodPurinaPurina ONE Chicken & Brown Rice Wet Dog FoodWet // No. 3 on the labelBlue Homestyle Recipe - Lamb & Garden Vegetables Wet Dog FoodBlueBlue Homestyle Recipe - Lamb & Garden Vegetables Wet Dog FoodWet // No. 3 on the labelOrijen Fit & Trim Grain-Free Dry Dog FoodOrijenOrijen Fit & Trim Grain-Free Dry Dog FoodDry // No. 3 on the labelOrijen Small Breed Grain-Free Dry Dog FoodOrijenOrijen Small Breed Grain-Free Dry Dog FoodDry // No. 3 on the labelPurina Beneful Freshly Prepared Meals Chicken Pouch Wet Dog FoodPurinaPurina Beneful Freshly Prepared Meals Chicken Pouch Wet Dog FoodWet // No. 4 on the labelPurina Pro Plan Small Breed Chicken Carrots Gravy Wet Dog FoodPurinaPurina Pro Plan Small Breed Chicken Carrots Gravy Wet Dog FoodWet // No. 4 on the labelPurina Beneful Prepared Meals Beef Chicken Wet Dog FoodPurinaPurina Beneful Prepared Meals Beef Chicken Wet Dog FoodWet // No. 4 on the labelPurina Beneful Freshly Prepared Blends Salmon Wet Dog FoodPurinaPurina Beneful Freshly Prepared Blends Salmon Wet Dog FoodWet // No. 4 on the labelPurina Beneful Prepared Meals Simmered Beef Wet Dog FoodPurinaPurina Beneful Prepared Meals Simmered Beef Wet Dog FoodWet // No. 4 on the labelPurina Pro Plan Adult Small Breed Beef & Green Beans Entrée in Gravy Wet Dog FoodPurinaPurina Pro Plan Adult Small Breed Beef & Green Beans Entrée in Gravy Wet Dog FoodWet // No. 4 on the label

On labels as

Organic liver: what changes

One page covers every name. Here is what each label word adds, and whether it changes anything for your dog.

Organic liver

Matters for your dog A little

Organic Liver

What it means Under USDA National Organic Program rules, the animal ate certified organic feed, had year-round outdoor access and got no growth hormones; meat from antibiotic-treated animals cannot be sold as organic. A food can name organic liver in its ingredients without being certified organic itself; the USDA seal needs at least 95% organic.

For your dog The real difference is how the animal was raised. A meta-analysis found about 47% more omega-3 fat in organic meat than conventional, with high variation between studies; it did not report on liver, and no dog study shows a health effect. Organic liver still ranks by wet weight.13,14,15,16,17,18

  1. Strong
  2. Some
  3. Thin
  4. None

Sources

What we read

Checked October 1, 2026.

  1. 1 Characterisation of spray dried hydrolysed chicken liver powder: effects on palatability and digestibility when included as single source of animal protein in dog diets FAO AGRIS record of Italian Journal of Animal Science paper, 2021 // Database
  2. 2 Hydrolyzed chicken liver used as single source of animal protein in diet and its effect on cytokines, immunoglobulins, and fecal microbiota profile of adult dogs PLOS ONE, 2022 // Journal
  3. 3 A randomized, double-blinded crossover trial testing the benefit of two hydrolysed poultry-based commercial diets for dogs with spontaneous pruritic chicken allergy Veterinary Dermatology, 2016 // Journal
  4. 4 Offal Chemical Composition from Veal, Beef, and Lamb Maintained in Organic Production Systems Animals, 2019 // Journal
  5. 5 Physicochemical Parameters of Raw Pet Food and Dehydrated Pet Treats Developed from Beef Processing Co-Products Animals, 2022 // Journal
  6. 6 Reading Labels AAFCO, n.d. // Regulator
  7. 7 Copper hepatopathy and dietary management Cornell University College of Veterinary Medicine, 2024 // University
  8. 8 Dog and Cat Foods Merck Veterinary Manual, n.d. // Book
  9. 9 Toxicoses in Animals From Human Multivitamins and Supplements Merck Veterinary Manual, n.d. // Book
  10. 10 Beef and Pork Byproducts: Enhancing the U.S. Meat Industry’s Bottom Line USDA Economic Research Service, 2011 // Government
  11. 11 P.PSH.1430 - Reduction of Vitamin A in lamb liver for pet food application Meat & Livestock Australia, 2023 // Industry
  12. 12 Nutrient density of hydrolyzed chicken liver powders Proliver, 2021 // Industry
  13. 13 Organic AAFCO, n.d. // Regulator
  14. 14 7 CFR § 205.237 Livestock feed Cornell Law School Legal Information Institute (eCFR text), n.d. // Regulator
  15. 15 7 CFR § 205.238 Livestock health care practice standard Cornell Law School Legal Information Institute (eCFR text), n.d. // Regulator
  16. 16 7 CFR § 205.239 Livestock living conditions Cornell Law School Legal Information Institute (eCFR text), n.d. // Regulator
  17. 17 Composition differences between organic and conventional meat: a systematic literature review and meta-analysis British Journal of Nutrition, 2016 // Journal
  18. 18 7 CFR § 205.305 Multi-ingredient packaged products with less than 70 percent organically produced ingredients Cornell Law School Legal Information Institute (eCFR text), n.d. // Regulator
An ingredient on its own tells you very little. What matters is how much of it there is and where it sits in the list. That is why we weigh the top five rather than reacting to any single name further down. Back to the wiki

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