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Ingredient file // Vitamin or mineral

Calcium Carbonate

A useful calcium adjustment for a balanced diet

Calcium carbonate is a ground mineral used to adjust a dog food's calcium level without adding much phosphorus. It supplies calcium dogs need for bones, nerves and muscles. The finished recipe, especially a puppy formula, determines whether the amount is right.

Role in the food Supporting nutrient
What it is
A ground mineral added to dog food to supply calcium while contributing almost no phosphorus.
Made from
Usually quarried limestone
Main job
Adjusts dietary calcium
Typical amount
1 to 1.6% in published adult formulas
Watch for
Extra calcium in growing puppies' diets
Not the same as
Dicalcium phosphate

Straight answer

Is Calcium Carbonate safe for dogs?

Read the diet, not the mineral line

Calcium carbonate low on a label is an ordinary mineral adjustment. Its position tells you little about the finished food's calcium level. Read the nutritional adequacy statement for your dog's life stage. For a large puppy, choose a food intended for large-size growth, and leave extra calcium out of a complete diet.

Why it is in the food
Adjusts dietary calcium

Our read // In our catalog

In 1 of every 2 foods we track

Share of foods that list it

42%

1,340 of the 3,204 foods with an ingredient list on file, from 78 brands. 922 dry dog food, 325 wet dog food, 35 frozen dog food.

Each square is 1% of the catalog

Where it sits on the label

Median position 16. In the top five of 3 foods, so it is usually a minor ingredient.

Top five List position, heaviest first

Above the salt

46%

Usually listed after the salt, which caps it at roughly 1% of the recipe in 54% of foods.

Price per lb

Foods with it $3.12
All foods $3.25

Median of the cheapest bag price across 795 priced foods, 4% below the catalog. The price is the food's, not the ingredient's.

Who leans on it

11%

of the foods that list it are from Royal Canin. 78 brands use it in total.

The story

From a 1931 terrier case to large puppy limits

Calcium carbonate reaches dog food as ground limestone, the same mineral that suppliers mill for animal feed. Its link to puppy bones goes back almost a century. A 2011 review describes a case from a 1931 German pathology text. A Fox Terrier puppy developed severe skeletal disease after calcium carbonate was added to its diet. The signs disappeared once bone meal replaced the carbonate. That swap raised phosphorus and brought the two minerals back into balance.2,8

The modern evidence came from veterinary researchers working with Great Danes. In a 1986 paper, Goedegebuure and Hazewinkel described pups fed a supplement with 3 times the recommended calcium. Their growth cartilage showed defects comparable to osteochondrosis, and their bone matured and remodeled more slowly. A 2002 study from the same group in 67 Great Danes and 23 Miniature Poodles explained part of the risk. Passive absorption alone took in 53% of the calcium the pups ate, at any intake.11,12

A 2000 trial from that group added phosphorus to the picture. Great Danes fed extra calcium without matching phosphorus developed rickets, and osteochondrosis lesions appeared even after their diet was corrected. Regulators later narrowed the target. Starting in 2016, AAFCO required growth foods to state whether they meet a separate standard for puppies expected to top 70 pounds as adults. That standard sets a narrower calcium range for those puppies.13,16

What it is

How it is made

Mineral suppliers quarry limestone for uses that include animal feed. For ground calcium carbonate, they mill and screen selected stone into powder. It comes from a mineral deposit rather than a food processing leftover.5,8

  1. 01 // Source Limestone Selected stone comes from a deposit containing calcium carbonate and varying amounts of other minerals.
  2. 02 // Process Ground The limestone is milled into smaller particles for use as a mineral ingredient.
  3. 03 // Process Screened Screening separates the ground material by particle size before it is sold.
  4. 04 // Output Mineral powder The dry powder arrives at the food plant as a concentrated source of calcium.

What is in it

Composition, dry matter

38.7

% calcium

The feed table average. Even a small addition changes the finished food's calcium level, so the recipe must account for it.

Calcium 336-420 g/kg4
Ash 95.9-100%4
Insoluble ash 0-9.7%4
Phosphorus 0.1-1 g/kg4
Magnesium 1.2-6 g/kg4

Limestone deposits carry different amounts of other minerals. The published calcium and magnesium ranges describe the ingredient; the finished food's mineral levels depend on its entire formula.4,5

Benefits

What it does for your dog

Each benefit carries the same evidence grade as the claims below.

  1. 01

    Fills a calcium gap in the recipe

    AAFCO explains that a recipe whose main ingredients run low in calcium needs another source. At roughly 39% calcium, a small amount of carbonate closes that gap. That is arithmetic, not a marketing claim.4,6

    1. Strong
    2. Some
    3. Thin
    4. None
  2. 02

    Calcium for bones that are still growing

    Puppies absorb more calcium as intake rises. In 32 Great Danes, bone mineral tracked the diet's calcium and phosphorus up to about 6 months. The goal is the right level, not more.7,12,14

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

Why it is in the bag

A real calcium source, even low on the list

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

Manufacturers add it to set the food's calcium level for its life stage while adding almost no phosphorus. It often sits well down the ingredient list, and labels rank ingredients by weight, so the amount is small: 1 to 1.6% of the recipe in one set of published adult formulas. At about 39% calcium, even 1% of it adds roughly 0.4% calcium to the recipe. That is a working nutrient, not bulk.3,4,7,17

  1. 01

    Sets the calcium level

    Meat and other base ingredients contribute different amounts of calcium. Manufacturers add a concentrated source when the recipe needs more to meet its intended life stage.4,6,7

  2. 02

    Adds little phosphorus

    Calcium carbonate supplies substantial calcium with only trace phosphorus. That lets a formulator adjust calcium without raising phosphorus by the same amount.4,7

  3. 03

    Supplies calcium at scale

    Limestone is abundant, and suppliers grind it for feed. One supplier describes its product as cost-effective, though that is a sales claim rather than a published price comparison.5,8,9

How much One set of published adult dog formulas used calcium carbonate at 1 to 1.6% of the recipe.3

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

    It raises calcium without adding phosphorus

    Evidence

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

    The feed table lists 387 g/kg calcium and only 0.3 g/kg phosphorus on a dry matter basis. That is a useful mineral adjustment, provided the finished food has an appropriate calcium to phosphorus balance.4,7

  2. Brands say

    Calcium carbonate supplies calcium dogs can use

    Evidence

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

    In an 18-dog, 40-week trial, a high-calcium diet containing calcium carbonate and bone ash maintained calcium balance. The study supports its use in a balanced diet but cannot isolate carbonate's contribution or show a special bone benefit.1

  3. Owners say

    Extra calcium makes puppy bones stronger

    Outruns the evidence

    Evidence

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

    A review of puppy trials links excess calcium to skeletal problems, especially when phosphorus is marginal. AAFCO limits calcium in food formulated for large-size growth to 1.8% dry matter. More calcium is not a bone-building shortcut.2,7

  4. Owners say

    Calcium carbonate in food causes urinary stones

    Outruns the evidence

    Evidence

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

    In an 18-dog, 40-week trial, the high-calcium diet raised urinary calcium but did not raise calcium oxalate supersaturation or produce urinary disease. The diet also contained bone ash, and this single trial does not show stone risk for every recipe.1

  5. Critics say

    This cheap mineral is just filler

    Outruns the evidence

    Evidence

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

    At about 39% calcium, it has a measurable job. AAFCO explains that recipes low in calcium from their main ingredients need another calcium source. Its cost does not make that mineral adjustment meaningless.4,6,9

The research

Studies worth knowing

Published research we read for this page, dog studies first.

  1. 1986 // Feeding trial, 2 diets

    Triple the calcium disrupted Great Dane puppy bone growth11

    Great Dane puppies

    Found. Pups fed a supplement with 3 times the recommended calcium developed cartilage defects comparable to osteochondrosis, plus slower bone maturation and remodeling. The comparison group ate a diet that met recommended requirements.

    What it means. Calcium above the requirement does not build better bones in giant puppies. Do not add a calcium supplement to a complete puppy food.

  2. 2002 // Mineral balance study

    Puppies absorb calcium even when they have plenty12

    67 Great Dane and 23 Miniature Poodle puppies

    Found. On diets from 0.33 to 3.3% calcium on a dry matter basis, passive absorption alone took up 53% of intake. At excessive intakes it drove calcium retention above need. Breed made no difference.

    What it means. A growing puppy keeps part of any surplus, so the food's calcium level has to stay in range.

  3. 2000 // Feeding trial, 3 diets

    High calcium without phosphorus caused rickets in Great Danes13

    Great Dane puppies from weaning

    Found. Pups fed extra calcium without matching phosphorus until 17 weeks developed rickets. After 10 weeks on a normal diet, the rickets resolved but osteochondrosis lesions appeared. Extra calcium with extra phosphorus still slowed growth.

    What it means. Calcium and phosphorus have to be in balance. Damage from a surplus can show up after the diet is corrected.

  4. 2002 // Feeding trial, 3 diets

    Extra dietary minerals gave puppies no lasting bone advantage14

    32 Great Dane puppies from 4 litters

    Found. Bone mineral content rose with the calcium and phosphorus in the diet. The gap between groups grew until 6 months, then shrank, and body composition no longer differed at 12 months.

    What it means. Higher mineral intake raised bone mineral early, but body composition no longer differed between groups by 12 months.

  5. 2024 // Feeding trial, 2 diets

    A different calcium mix did not change what adult dogs kept15

    8 adult Foxhound crossbred dogs

    Found. Apparent calcium digestibility was negative on both diets, minus 2% and minus 14%, with no significant difference. One diet got 39% of its added calcium from carbonate. Urinary calcium did not change with diet.

    What it means. In this small trial, swapping between these two calcium mixes did not significantly change apparent calcium digestibility.

Straight answers

What owners ask

  1. Q01

    Is it just filler?

    No

    It supplies concentrated calcium, not bulk or calories. A recipe needs the right mineral levels for its intended life stage, and this ingredient gives manufacturers a way to adjust them.4,6

  2. Q02

    Does it add phosphorus too?

    Hardly any

    The feed table shows only trace phosphorus beside a large amount of calcium. Dicalcium phosphate supplies both minerals. The finished food still needs the right balance between them.4,7

  3. Q03

    Should I add more calcium?

    Not routinely

    Do not add calcium to a complete puppy food because this ingredient appears on the label. Extra calcium can upset the mineral balance, and growing large dogs are particularly sensitive to excess intake.2,7,10

Who uses it

Brands, best sellers and the company it keeps

Top brands, by foods that list it

  1. Royal Canin 145 / 160
  2. Blue 129 / 186
  3. Purina 113 / 185
  4. Hill's 78 / 116
  5. NutriSource 58 / 91
  6. Fromm 56 / 67
  7. Stella & Chewy's 49 / 85
  8. Merrick 42 / 107
  9. Nulo 42 / 117
  10. Cesar 38 / 45

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

Plus 68 more brands.

Amazon best sellers that list it

  1. #1 Blue Life Protection Formula Adult Chicken and Brown Rice Recipe Dry Dog Food
  2. #2 Purina One SmartBlend Adult Dog Lamb & Rice Formula Dry Dog Food
  3. #3 Purina Pro Plan Adult Complete Essentials Shredded Blend Chicken & Rice Formula Dry Dog Food
  4. #5 Blue Life Protection Formula Adult Small Breed Chicken and Brown Rice Recipe Dry Dog Food
  5. #7 Stella & Chewy’s Marie’s Magical Dinner Dust Cage-Free Chicken Recipe Freeze-Dried Raw Dog Food Topper
  6. #9 Purina Pro Plan Adult Sensitive Skin & Stomach Salmon & Rice Formula Dry Dog Food
  7. #12 Pedigree Adult Grilled Steak & Vegetable Flavor Dry Dog Food
  8. #13 Hill’s Science Diet Adult 1-6 Small Bites Chicken & Barley Recipe 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 38%
  2. Natural Flavor 36%
  3. Mixed Tocopherols 36%
  4. Chicken Fat 35%
  5. Peas 26%
  6. Chicken Meal 24%
  7. Brown Rice 23%
  8. Flaxseed 22%
  9. Dried Plain Beet Pulp 17%
  10. Brewers Rice 16%
  11. Potatoes 16%
  12. Barley 16%

On the shelf

Foods that list Calcium Carbonate

1,340 foods in our catalog list it. These 60 list it highest on the label.

Evanger’s Grain Free Braised Beef Chunks with Gravy - packed by hand! Wet Dog FoodEvanger'sEvanger’s Grain Free Braised Beef Chunks with Gravy - packed by hand! Wet Dog FoodWet // No. 5 on the labelEvanger’s Roasted Chicken Drummet Dinner - packed by hand! Grain-Free Wet Dog FoodEvanger'sEvanger’s Roasted Chicken Drummet Dinner - packed by hand! Grain-Free Wet Dog FoodWet // No. 5 on the labelZignature Inception Pork Recipe Food Can Wet Dog FoodZignatureZignature Inception Pork Recipe Food Can Wet Dog FoodWet // No. 5 on the labelMerrick Fresh Selects Turkey & Brown Rice Fresh Frozen Dog FoodMerrickMerrick Fresh Selects Turkey & Brown Rice Fresh Frozen Dog FoodFrozen // No. 6 on the labelGravy Train Ground Dinner With Chicken Wet Dog FoodGravy TrainGravy Train Ground Dinner With Chicken Wet Dog FoodWet // No. 6 on the labelAgainst the Grain The Good Egg - Steak ‘n Egg Wet Dog FoodAgainst the GrainAgainst the Grain The Good Egg - Steak ‘n Egg Wet Dog FoodWet // No. 6 on the labelAgainst the Grain The Good Egg - Bacon N Eggs Scramble Wet Dog FoodAgainst the GrainAgainst the Grain The Good Egg - Bacon N Eggs Scramble Wet Dog FoodWet // No. 6 on the labelEarthborn Holistic Grain Free Classics K95 Lamb Wet Dog FoodEarthborn HolisticEarthborn Holistic Grain Free Classics K95 Lamb Wet Dog FoodWet // No. 6 on the labelZignature Original Food Venison Formula Grain-Free Wet Dog FoodZignatureZignature Original Food Venison Formula Grain-Free Wet Dog FoodWet // No. 6 on the labelRoyal Canin Veterinary Selected Protein KO Dry Dog FoodRoyal CaninRoyal Canin Veterinary Selected Protein KO Dry Dog FoodDry // No. 6 on the labelNature’s Recipe Healthy Skin Vegetarian Recipe Dry Dog FoodNature's RecipeNature’s Recipe Healthy Skin Vegetarian Recipe Dry Dog FoodDry // No. 6 on the labelMerrick Fresh Selects Chicken & Brown Rice Fresh Frozen Dog FoodMerrickMerrick Fresh Selects Chicken & Brown Rice Fresh Frozen Dog FoodFrozen // No. 7 on the label
Show 48 more
Merrick Fresh Selects Beef & Brown Rice Fresh Frozen Dog FoodMerrickMerrick Fresh Selects Beef & Brown Rice Fresh Frozen Dog FoodFrozen // No. 7 on the labelDave’s Pet Food 95% Premium Meats Chicken & Beef For Dogs / Grain-Free Wet Dog FoodDave's Pet FoodDave’s Pet Food 95% Premium Meats Chicken & Beef For Dogs / Grain-Free Wet Dog FoodWet // No. 7 on the labelGentle Giants Natural Non GMO Ingredients Grain Free Dog and Puppy Food Gentle Giants ‘Quality of Life’ 90% Beef -Dog and Puppy Wet Dog FoodGentle GiantsGentle Giants Natural Non GMO Ingredients Grain Free Dog and Puppy Food Gentle Giants ‘Quality of Life’ 90% Beef -Dog and Puppy Wet Dog FoodWet // No. 7 on the labelInaba Churu Meal Chicken Recipe Grain-Free Dog Food TopperINABAInaba Churu Meal Chicken Recipe Grain-Free Dog Food TopperTopper // No. 7 on the labelInaba Churu Meal Chicken with Beef Recipe Grain-Free Dog Food TopperINABAInaba Churu Meal Chicken with Beef Recipe Grain-Free Dog Food TopperTopper // No. 7 on the labelEvanger’s Chunky Chicken Casserole - packed by hand! Wet Dog FoodEvanger'sEvanger’s Chunky Chicken Casserole - packed by hand! Wet Dog FoodWet // No. 7 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. 7 on the labelThe Honest Kitchen Tender Turkey One Pot Stew Wet Dog FoodThe Honest KitchenThe Honest Kitchen Tender Turkey One Pot Stew Wet Dog FoodWet // No. 7 on the labelThe Honest Kitchen Slow Cooked Chicken One Pot Stew Wet Dog FoodThe Honest KitchenThe Honest Kitchen Slow Cooked Chicken One Pot Stew Wet Dog FoodWet // No. 7 on the labelFarmina Vet Life Derma Management with Fish canine Dry Dog FoodFarminaFarmina Vet Life Derma Management with Fish canine Dry Dog FoodDry // No. 7 on the labelRoyal Canin Veterinary Selected Protein PW Grain-Free Dry Dog FoodRoyal CaninRoyal Canin Veterinary Selected Protein PW Grain-Free Dry Dog FoodDry // No. 7 on the labelRoyal Canin Veterinary Selected Protein PW Large Breed Grain-Free Dry Dog FoodRoyal CaninRoyal Canin Veterinary Selected Protein PW Large Breed Grain-Free Dry Dog FoodDry // No. 7 on the labelWysong Fundamentals Dry Dog FoodWysongWysong Fundamentals Dry Dog FoodDry // No. 7 on the labelTaste of the Wild Prey Trout Limited Ingredient Recipe for Dogs Grain-Free Dry Dog FoodTaste of the WildTaste of the Wild Prey Trout Limited Ingredient Recipe for Dogs Grain-Free Dry Dog FoodDry // No. 7 on the labelOnly Natural Pet PowerStew Venison & Duck Feast Grain-Free Wet Dog FoodOnly Natural PetOnly Natural Pet PowerStew Venison & Duck Feast Grain-Free Wet Dog FoodWet // No. 8 on the labelTucker’s Patties Turkey-Pumpkin Raw Diet Frozen Dog FoodTucker'sTucker’s Patties Turkey-Pumpkin Raw Diet Frozen Dog FoodFrozen // No. 8 on the labelTucker’s Patties Pork-Lamb-Pumpkin Raw Diet Frozen Dog FoodTucker'sTucker’s Patties Pork-Lamb-Pumpkin Raw Diet Frozen Dog FoodFrozen // No. 8 on the labelTucker’s Patties Pork-Bison-Pumpkin Raw Diet Frozen Dog FoodTucker'sTucker’s Patties Pork-Bison-Pumpkin Raw Diet Frozen Dog FoodFrozen // No. 8 on the labelTucker’s Patties Pork-Beef-Pumpkin Raw Diet Frozen Dog FoodTucker'sTucker’s Patties Pork-Beef-Pumpkin Raw Diet Frozen Dog FoodFrozen // No. 8 on the labelGravy Train Beefy Classic Dry Dog FoodGravy TrainGravy Train Beefy Classic Dry Dog FoodDry // No. 8 on the labelGravy Train Meaty Ground Dinner With Beef & Bacon Wet Dog FoodGravy TrainGravy Train Meaty Ground Dinner With Beef & Bacon Wet Dog FoodWet // No. 8 on the labelGravy Train Chunks In Gravy With Chicken Chunks Wet Dog FoodGravy TrainGravy Train Chunks In Gravy With Chicken Chunks Wet Dog FoodWet // No. 8 on the labelCesar Classic Loaf in Sauce Chicken & Liver Wet Dog FoodCesarCesar Classic Loaf in Sauce Chicken & Liver Wet Dog FoodWet // No. 8 on the labelCesar Classic Loaf in Sauce Grilled Chicken Wet Dog FoodCesarCesar Classic Loaf in Sauce Grilled Chicken Wet Dog FoodWet // No. 8 on the labelKoha Minimal Ingredient Stew Duck Stew Wet Dog FoodKohaKoha Minimal Ingredient Stew Duck Stew Wet Dog FoodWet // No. 8 on the labelInaba Churu Meal in Gravy Chicken Recipe with Vegetables Grain-Free Wet Dog FoodINABAInaba Churu Meal in Gravy Chicken Recipe with Vegetables Grain-Free Wet Dog FoodWet // No. 8 on the labelInaba Churu Meal Chicken with Cheese Recipe Grain-Free Dog Food TopperINABAInaba Churu Meal Chicken with Cheese Recipe Grain-Free Dog Food TopperTopper // No. 8 on the labelInaba Churu Meal Chicken with Pumpkin Recipe Grain-Free Dog Food TopperINABAInaba Churu Meal Chicken with Pumpkin Recipe Grain-Free Dog Food TopperTopper // No. 8 on the labelBil-Jac Sensitive Solutions Healthy Weight Support Dry Dog FoodBil-JacBil-Jac Sensitive Solutions Healthy Weight Support Dry Dog FoodDry // No. 8 on the labelKirkland Signature Nature’s Domain, Turkey & Pea Stew, 24-count Grain-Free Wet Dog FoodKirkland SignatureKirkland Signature Nature’s Domain, Turkey & Pea Stew, 24-count Grain-Free Wet Dog FoodWet // No. 8 on the labelEarthborn Holistic Grain Free Classics K95 Turkey Wet Dog FoodEarthborn HolisticEarthborn Holistic Grain Free Classics K95 Turkey Wet Dog FoodWet // No. 8 on the labelEarthborn Holistic Grain Free Classics K95 Beef Wet Dog FoodEarthborn HolisticEarthborn Holistic Grain Free Classics K95 Beef Wet Dog FoodWet // No. 8 on the labelEarthborn Holistic Grain Free Classics K95 Duck Wet Dog FoodEarthborn HolisticEarthborn Holistic Grain Free Classics K95 Duck Wet Dog FoodWet // No. 8 on the labelEarthborn Holistic Grain Free Classics K95 Chicken Wet Dog FoodEarthborn HolisticEarthborn Holistic Grain Free Classics K95 Chicken Wet Dog FoodWet // No. 8 on the labelEvanger’s Grain Free LID Venison + Beef Dinner Wet Dog FoodEvanger'sEvanger’s Grain Free LID Venison + Beef Dinner Wet Dog FoodWet // No. 8 on the labelFromm Four-Star Diner Specials Slow-Cooked Pulled Pork Entrée in Gravy Wet Dog FoodFrommFromm Four-Star Diner Specials Slow-Cooked Pulled Pork Entrée in Gravy Wet Dog FoodWet // No. 8 on the labelThe Honest Kitchen Roasted Beef One Pot Stew Wet Dog FoodThe Honest KitchenThe Honest Kitchen Roasted Beef One Pot Stew Wet Dog FoodWet // No. 8 on the labelThe Honest Kitchen Braised Beef & Lamb One Pot Stew Wet Dog FoodThe Honest KitchenThe Honest Kitchen Braised Beef & Lamb One Pot Stew Wet Dog FoodWet // No. 8 on the labelHealth Extension food Grain Free Mediterranean Wet Dog FoodHealth ExtensionHealth Extension food Grain Free Mediterranean Wet Dog FoodWet // No. 8 on the labelPedigree Weight Management Chopped Ground Dinner Adult, Chicken & Rice Dinner Wet Dog FoodPedigreePedigree Weight Management Chopped Ground Dinner Adult, Chicken & Rice Dinner Wet Dog FoodWet // No. 8 on the labelCesar Classic Loaf in Sauce Turkey Wet Dog FoodCesarCesar Classic Loaf in Sauce Turkey Wet Dog FoodWet // No. 8 on the labelCesar Classic Loaf in Sauce Grilled Steak & Eggs Wet Dog FoodCesarCesar Classic Loaf in Sauce Grilled Steak & Eggs Wet Dog FoodWet // No. 8 on the labelCesar Classic Loaf in Sauce Beef Grain-Free Wet Dog FoodCesarCesar Classic Loaf in Sauce Beef Grain-Free Wet Dog FoodWet // No. 8 on the labelCesar Classic Loaf in Sauce Lamb Wet Dog FoodCesarCesar Classic Loaf in Sauce Lamb Wet Dog FoodWet // No. 8 on the labelCesar Classic Loaf in Sauce Duck Grain-Free Wet Dog FoodCesarCesar Classic Loaf in Sauce Duck Grain-Free Wet Dog FoodWet // No. 8 on the labelNutro Tender Beef Recipe Grain-Free Wet Dog FoodNutroNutro Tender Beef Recipe Grain-Free Wet Dog FoodWet // No. 8 on the labelBil-Jac Senior Dry Dog FoodBil-JacBil-Jac Senior Dry Dog FoodDry // No. 8 on the labelWysong Archetype Burgers Freeze-Dried Raw Dog FoodWysongWysong Archetype Burgers Freeze-Dried Raw Dog FoodFreeze-Dried // No. 8 on the label

Sources

What we read

Checked September 1, 2026.

  1. 1 Adult dogs are capable of regulating calcium balance, with no adverse effects on health, when fed a high-calcium diet British Journal of Nutrition, 2017 // Journal
  2. 2 Factors that modify the effect of excess calcium on skeletal development in puppies British Journal of Nutrition, 2011 // Journal
  3. 3 Effects of different chicken protein sources on palatability in dry adult dog food Frontiers in Animal Science, 2023 // Journal
  4. 4 Calcium carbonate Tables of composition and nutritional values of feed materials, INRA CIRAD AFZ, n.d. // Database
  5. 5 Calcium Carbonate USDA National Organic Program, 2018 // Government
  6. 6 Frequently Asked Questions AAFCO, n.d. // Regulator
  7. 7 AAFCO Dog and Cat Food Nutrient Profiles AAFCO, 2014 // Regulator
  8. 8 Calcium Carbonate JFE Mineral & Alloy Company, n.d. // Industry
  9. 9 Hubercarb Q200-FSMA Nagase America, n.d. // Industry
  10. 10 Selecting the Right Pet Food AAFCO, n.d. // Regulator
  11. 11 Morphological findings in young dogs chronically fed a diet containing excess calcium Veterinary Pathology (Europe PMC record), 1986 // Journal
  12. 12 Intestinal calcium absorption in growing dogs is influenced by calcium intake and age but not by growth rate The Journal of Nutrition (Europe PMC record), 2002 // Journal
  13. 13 Effects of diets with different calcium and phosphorus contents on the skeletal development and blood chemistry of growing great danes The Veterinary Record (Europe PMC record), 2000 // Journal
  14. 14 Influence of dietary calcium and phosphorus content in a fixed ratio on growth and development in Great Danes American Journal of Veterinary Research (Europe PMC record), 2002 // Journal
  15. 15 Apparent digestibility and calcium and phosphorus in urine after feeding different combinations of calcium and phosphorus sources to adult dogs Journal of Animal Physiology and Animal Nutrition (PMC), 2024 // Journal
  16. 16 Confused About What to Feed Your Large Breed Puppy? New Rules May Help! Petfoodology, Cummings Veterinary Medical Center at Tufts University, 2017 // University
  17. 17 Animal Food Labeling and Pet Food Claims U.S. Food and Drug Administration, 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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