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Ingredient file // Animal protein

Lamb Kidney

A useful organ with limits the label hides

Lamb kidney is a named organ from lambs slaughtered for meat. It supplies animal protein, vitamin B12 and minerals. The label tells you which organ was used, but not how much is in the food or whether the finished recipe meets your dog's needs.

What it is
A lamb's kidney, removed and trimmed for use as a distinct animal food ingredient.
Made from
Kidneys of slaughtered lambs
Main job
Animal protein and minerals
Typical amount
Not published
Watch for
Phosphorus in dogs on renal diets
Not the same as
Lamb liver

Straight answer

Is Lamb Kidney safe for dogs?

Read the whole recipe around the organ

Look at what sits around lamb kidney and check the food's nutritional adequacy statement. List position shows weight before processing, not a kidney percentage. For a topper, count all extras together. Choose another food if your dog reacts to lamb or needs phosphorus restriction.

Why it is in the food
Animal protein and minerals

Our read // In our catalog

In 1 of every 139 foods we track

Share of foods that list it

<1%

23 of the 3,204 foods with an ingredient list on file, from 11 brands. 9 frozen dog food, 5 freeze-dried dog food, 4 wet dog food.

Each square is 1% of the catalog

Where it sits on the label

Median position 6. In the top five of 11 foods, so it is usually a supporting 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 $9.54
All foods $3.25

Median of the cheapest bag price across 8 priced foods, 194% above the catalog. The price is the food's, not the ingredient's.

Who leans on it

30%

of the foods that list it are from Stella & Chewy's. 11 brands use it in total.

What it is

How it is made

Lamb processing produces kidneys alongside the cuts sold as meat. Removing and preparing the organs gives processors another outlet for the animal. Pet food makers can add the named kidney to a recipe.3,5

  1. 01 // Source Slaughtered lamb The kidney comes from a lamb processed for meat.
  2. 02 // Process Kidney separated Processors remove the organ and keep it distinct from muscle meat.
  3. 03 // Process Outer tissue trimmed Fat, veins and connective tissue are removed from the edible portion.
  4. 04 // Output Prepared kidney The named organ is ready to be weighed into a pet food recipe.

What is in it

Composition, dry matter

76-80

% protein

Calculated from 2 USDA entries for raw lamb kidney. That protein reaches a dog only in proportion to the kidney used.

Crude protein 75.8-80.1%3
Crude fat 13.4-14.2%3
Phosphorus 11.8-12.9 g/kg3
Iron 307-348 mg/kg3
Vitamin B12 2.5-2.7 mg/kg3
Ash 6.1-6.3%3
Selenium 4.9-6.1 mg/kg3

These are calculations from 2 raw kidney entries, one domestic and one imported, rather than a measured range across pet food batches. Cooking or drying may change the finished ingredient's nutrient levels.3

Why it is in the bag

What the manufacturer gets

  1. 01

    Adds animal protein

    Raw kidney is mostly water, but about 76 to 80% of its dry matter is protein. The ingredient list does not disclose how much of that protein enters the finished food.3,6

  2. 02

    Supplies measured nutrients

    Raw kidney contributes vitamin B12, iron, selenium and phosphorus. A formulator can account for them; an owner needs the finished food's analysis to judge the recipe.3,6

  3. 03

    Uses a slaughter organ

    Selling kidneys for pet food gives meat processors an outlet beyond the main cuts. Industry reporting tracks organ meat as a category, but does not isolate lamb kidney.5,10

How much No standard kidney percentage is published; if fed separately as a topper, count it among extras kept below 10% of daily calories.6,8

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

    Lamb kidney adds protein and vitamin B12

    Evidence

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

    Two USDA entries put raw lamb kidney at about 76 to 80% protein on a dry matter basis and record vitamin B12. Those are ingredient figures; the label does not reveal kidney's contribution to the whole food.3,6

  2. Brands say

    Lamb kidney makes dog food more appealing

    Outruns the evidence

    Evidence

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

    A university thesis used two-bowl acceptance tests in cats and found lamb kidney comparable to lamb liver. It did not test dogs or a finished dog food, so a dog preference claim goes beyond the result.9

  3. Owners say

    Lamb kidney is hypoallergenic for dogs

    Outruns the evidence

    Evidence

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

    A review counted lamb reactions in 14 of 297 dogs with reported food reactions. It did not test kidney separately. A lamb organ is no safe exception for a dog whose reaction trigger is lamb.2

  4. Brands say

    Eating kidney protects a dog's kidneys

    Outruns the evidence

    Evidence

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

    A brand makes this claim, but no kidney-feeding trial supports it. In a 24-dog renal study, diets differing in phosphorus and calcium produced different kidney outcomes. Kidney's organ name is no evidence of treatment.1,7,11

  5. Critics say

    Kidney is worthless filler

    Outruns the evidence

    Evidence

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

    Two USDA entries measure substantial protein, minerals and vitamin B12 in raw lamb kidney. The fair limit is that an ingredient list gives no quantity, so it cannot show how much nutrition the kidney adds.3,6

Straight answers

What owners ask

  1. Q01

    Is it just filler?

    No

    Kidney supplies animal protein and measured micronutrients. It has a nutritional job. Its place on the ingredient list shows relative weight before processing, but cannot tell you whether the amount is large enough to matter much.3,6

  2. Q02

    Is kidney the same as lamb meat?

    No

    Kidney is an internal organ. Listing it by name tells you which lamb part was added. The list still does not give its weight or its share of the finished food.3,5,6

  3. Q03

    Can a dog with kidney disease eat it?

    Check the diet

    Kidney contributes phosphorus, while renal diets generally restrict it. Check the phosphorus level of the complete food or topper against your dog's prescribed diet. The organ's name says nothing about its suitability.3,7

  4. Q04

    How much kidney belongs in food?

    No fixed rate

    The ingredient list does not disclose a kidney percentage. If you use kidney as a separate topper, count it with other treats and extras and keep their combined calories below 10% of the day's total.6,8

Who uses it

Brands, best sellers and the company it keeps

Top brands, by foods that list it

  1. Stella & Chewy's 7 / 85
  2. Instinct 3 / 98
  3. K9 Natural 2 / 8
  4. Raw Bistro 2 / 7
  5. ZIWI 2 / 11
  6. Weruva 2 / 50
  7. Viva Raw 1 / 8
  8. BIXBI 1 / 6
  9. Orijen 1 / 25
  10. Nulo 1 / 117

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

Plus 1 more brand.

Usually listed with, share of the foods that list it

  1. Lamb 100%
  2. Lamb Liver 96%
  3. Lamb Heart 52%
  4. Lamb Bone 48%
  5. Lamb Lung 26%
  6. Carrots 26%
  7. Lamb Spleen 26%
  8. Pumpkin Seeds 22%
  9. Flaxseed 22%
  10. Lamb Tripe 17%
  11. Sunflower Oil 17%
  12. Broccoli 17%

On the shelf

Foods that list Lamb Kidney

23 foods in our catalog list it, highest on the label first.

Viva Raw Complete Diet Lamb Frozen Dog FoodViva RawViva Raw Complete Diet Lamb Frozen Dog FoodFrozen // No. 2 on the labelInstinct Raw Boost Mixers Grass-Fed Lamb Recipe Freeze-Dried Dog Food TopperInstinctInstinct Raw Boost Mixers Grass-Fed Lamb Recipe Freeze-Dried Dog Food TopperTopper // No. 2 on the labelBixbi Rawbble Grain-Free Freeze-Dried Dog FoodBIXBIBixbi Rawbble Grain-Free Freeze-Dried Dog FoodFreeze-Dried // No. 3 on the labelRaw Bistro Lamb Entree 4 Pack Frozen Dog FoodRaw BistroRaw Bistro Lamb Entree 4 Pack Frozen Dog FoodFrozen // No. 4 on the labelInstinct Raw Longevity Patties Grass-Fed Lamb Recipe Frozen Dog FoodInstinctInstinct Raw Longevity Patties Grass-Fed Lamb Recipe Frozen Dog FoodFrozen // No. 4 on the labelBones & Co Grass-Fed Lamb Raw - The Bones & Co. Frozen Dog FoodBones & CoBones & Co Grass-Fed Lamb Raw - The Bones & Co. Frozen Dog FoodFrozen // No. 5 on the labelNulo Raw Lamb Recipe with Raspberries Freeze-Dried Dog FoodNuloNulo Raw Lamb Recipe with Raspberries Freeze-Dried Dog FoodFreeze-Dried // No. 5 on the labelRaw Bistro Lamb Grind with Turkey - Gently Cooked Frozen Dog FoodRaw BistroRaw Bistro Lamb Grind with Turkey - Gently Cooked Frozen Dog FoodFrozen // No. 5 on the labelStella & Chewy’s Dandy Lamb Frozen Raw Dinner Patties Frozen Dog FoodStella & Chewy'sStella & Chewy’s Dandy Lamb Frozen Raw Dinner Patties Frozen Dog FoodFrozen // No. 5 on the labelStella & Chewy’s Dandy Lamb Frozen Raw Dinner Morsels Frozen Dog FoodStella & Chewy'sStella & Chewy’s Dandy Lamb Frozen Raw Dinner Morsels Frozen Dog FoodFrozen // No. 5 on the labelK9 Natural Lamb Feast Grain-Free Freeze-Dried Dog FoodK9 NaturalK9 Natural Lamb Feast Grain-Free Freeze-Dried Dog FoodFreeze-Dried // No. 6 on the labelK9 Natural Lamb & King Salmon Feast Grain-Free Freeze-Dried Dog FoodK9 NaturalK9 Natural Lamb & King Salmon Feast Grain-Free Freeze-Dried Dog FoodFreeze-Dried // No. 6 on the label
Show 11 more
Instinct Raw Signature Patties Real Lamb Recipe Frozen Dog FoodInstinctInstinct Raw Signature Patties Real Lamb Recipe Frozen Dog FoodFrozen // No. 4 on the labelStella & Chewy’s Venison Blend Frozen Raw Dinner Patties Frozen Dog FoodStella & Chewy'sStella & Chewy’s Venison Blend Frozen Raw Dinner Patties Frozen Dog FoodFrozen // No. 6 on the labelWeruva Dogs in the Kitchen Lamburgini Wet Dog FoodWeruvaWeruva Dogs in the Kitchen Lamburgini Wet Dog FoodWet // No. 7 on the labelWeruva Dogs in the Kitchen Classic Dog Hot Dayam with Lamb in Gelée Wet Dog FoodWeruvaWeruva Dogs in the Kitchen Classic Dog Hot Dayam with Lamb in Gelée Wet Dog FoodWet // No. 7 on the labelZiwi Wet/Canned Lamb Wet Dog FoodZIWIZiwi Wet/Canned Lamb Wet Dog FoodWet // No. 11 on the labelZIWI /Mackerel And Lamb Grain-Free Wet Dog FoodZIWIZIWI /Mackerel And Lamb Grain-Free Wet Dog FoodWet // No. 11 on the labelStella & Chewy’s Limited Ingredient Grass-Fed Lamb Raw Coated Kibble Grain-Free Dry Dog FoodStella & Chewy'sStella & Chewy’s Limited Ingredient Grass-Fed Lamb Raw Coated Kibble Grain-Free Dry Dog FoodDry // No. 11 on the labelStella & Chewy’s Lamb Recipe with Pumpkin & Quinoa Raw Coated Kibble Wholesome Grains Dry Dog FoodStella & Chewy'sStella & Chewy’s Lamb Recipe with Pumpkin & Quinoa Raw Coated Kibble Wholesome Grains Dry Dog FoodDry // No. 11 on the labelOrijen Tundra Freeze-Dried Dog FoodOrijenOrijen Tundra Freeze-Dried Dog FoodFreeze-Dried // No. 12 on the labelStella & Chewy’s Grass-Fed Lamb Raw Coated Kibble Grain-Free Dry Dog FoodStella & Chewy'sStella & Chewy’s Grass-Fed Lamb Raw Coated Kibble Grain-Free Dry Dog FoodDry // No. 14 on the labelStella & Chewy’s Free Range Raw Blend Kibble Grain-Free Dry Dog FoodStella & Chewy'sStella & Chewy’s Free Range Raw Blend Kibble Grain-Free Dry Dog FoodDry // No. 15 on the label

Sources

What we read

Checked October 1, 2026.

  1. 1 Effects of phosphorus/calcium-restricted and phosphorus/calcium-replete 32% protein diets in dogs with chronic renal failure American Journal of Veterinary Research, 1992 // Journal
  2. 2 Critically appraised topic on adverse food reactions of companion animals (2): common food allergen sources in dogs and cats BMC Veterinary Research, 2016 // Journal
  3. 3 USDA National Nutrient Database for Standard Reference, Release 28 (2015): Lamb, Veal, and Game Products U.S. Department of Agriculture, 2015 // Database
  4. 4 Tips for Safe Handling of Pet Food and Treats U.S. Food and Drug Administration, 2024 // Government
  5. 5 Byproducts AAFCO, n.d. // Regulator
  6. 6 Reading Labels AAFCO, n.d. // Regulator
  7. 7 Chronic kidney disease International Renal Interest Society, n.d. // Nonprofit
  8. 8 Feeding treats to your dog World Small Animal Veterinary Association, 2024 // Nonprofit
  9. 9 Investigation into the palatability of lamb, beef and chicken offal used in the production of pet food : a thesis presented in partial fulfilment of the requirements for the degree of Master of Food Technology at Massey University, Manawatu, New Zealand Massey University, 2019 // University
  10. 10 Pet Food Production and Ingredient Analysis IFEEDER, NARA and Pet Food Institute, 2020 // Industry
  11. 11 Freeze-Dried Lamb Kidney Dog Treats | Alberta Sourced Treatos Box, 2026 // Industry
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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