Minerals for Dogs: Which Ones Are Needed & What to Do If

What are minerals in dogs?

Minerals are inorganic nutrients that dogs cannot produce on their own and must therefore obtain from their diet. They play structural roles (in bones and teeth), regulate fluid and acid-base balance, facilitate enzymatic reactions, and transmit nerve impulses.

A distinction is made between macrominerals (requirement >100 mg/day: calcium, phosphorus, sodium, potassium, magnesium, chloride, sulfur) and microminerals/trace elements (requirement <100 mg/day: iron, zinc, manganese, copper, selenium, iodine). The ratio between minerals is often more important than the absolute amount—in particular, the calcium-to-phosphorus ratio (Ca:P) is of critical importance in canine nutrition.

Background + Scientific Context

The NRC (2006, *Nutrient Requirements of Dogs and Cats*, National Academies Press) defines the scientific reference standard for mineral requirements in dogs: Calcium requirement for adult dogs: 100 mg/kg body weight/day; Ca:P ratio: 1:1 to 2:1. For puppies and young dogs, the absolute and relative requirements are higher—and at the same time, excess is more harmful than in adult animals. Excess selenium is potentially toxic; tolerance ranges are narrower for selenium than for other trace elements.

Dobenecker et al. (2006, Journal of Animal Physiology and Animal Nutrition, PubMed 16573684) investigated the effects of high calcium intake on bone development in growing dogs: Excess calcium in young dogs of large breeds significantly increases the risk of osteochondrosis (OCD) and skeletal development defects. Puppies of large breeds are more sensitive to excess calcium than those of small breeds. Bone meal supplementation without calculating the required amount is a common mistake in BARF diets.

Schoenmakers et al. (1999, Journal of Nutrition, PubMed 10419915) studied calcium metabolism in growing dogs: Intestinal calcium absorption is regulated less precisely in dogs than in cats—they absorb excess calcium in a less controlled manner. This makes puppies particularly vulnerable to supplementation errors. Optimal growth requires specific Ca:P ratios, not blanket high doses of minerals.

Vitomalia-Position

Minerals aren’t something you can just add as you please—overdosing is just as harmful as a deficiency, and often even more so. The classic BARF mistakes: no bones or too many bones, an incorrect Ca:P ratio, and no systematic supplementation of trace minerals. Commercial ready-made foods (AAFCO/FEDIAF-compliant) are reliably balanced in terms of mineral content; homemade BARF requires either expertise or a review by an external nutritionist.

When do minerals become important?

• BARF feeding without systematic calculation
• Growth stages in large-breed puppies (excess calcium is particularly risky)
• A diet consisting mainly of meat (calcium deficiency due to a high P:Ca ratio)
• Supplementation: What’s beneficial, and what’s unnecessary or dangerous?
• Kidney or bone diseases: specific mineral requirements adjusted

Practical application

Overview of macrominerals in dogs:

Important trace elements: - Zinc: Skin health, immune function — Deficiency leads to zinc deficiency dermatosis (especially in Huskies and Malamutes) - Selenium: Antioxidant — narrow safety margin, toxic at high doses - Iron: oxygen transport (hemoglobin) — deficiency is rare in meat-based diets - Iodine: Thyroid function — both deficiency and excess are risky

Practical Ca:P ratio: - Pure meat: ~0.1:1 (calcium deficiency) - Pure bone: ~2–3:1 (phosphorus deficiency) - Target: 1.2:1 to 1.5:1 (NRC recommendation)

Common Mistakes & Myths

• "More is better—more calcium = stronger bones." In puppies, excess calcium has been shown to cause skeletal development disorders. A balanced calcium-to-phosphorus ratio is more important than high absolute amounts.
• "Bones are always an ideal natural source of calcium." Raw bones can be a good source of calcium when given in the right proportions—but portion sizes and the calcium-to-phosphorus ratio must be carefully calculated; they shouldn't be added indiscriminately.
• “Mineral supplements make any diet complete.” Without calculating the total feed intake, mineral supplements are, at best, unnecessary; at worst, they can lead to a double overdose of a nutrient that’s already present.

Current State of Research (2026)

The NRC 2006 remains the gold standard for mineral requirements—although more recent studies provide more nuanced insights into individual differences in needs (breed, size, age, activity level). FEDIAF (2021) updated recommendations for macro- and microminerals for commercial pet food formulation. BARF nutritionists use the NRC as a basis for their calculations; software-assisted ration calculations (e.g., pet-diet.com, Raw Fed & Nerdy) facilitate accurate mineral balancing.

Frequently Asked Questions

Which minerals does a dog need most?

The correct ratio of calcium to phosphorus (Ca:P 1.2–1.5:1) is critical—especially for bones and the skeletal system. Zinc, selenium, iron, and iodine are essential trace elements, but are needed in smaller amounts. Imbalances in calcium and phosphorus have the most significant impact, especially in puppies.

Does my dog need mineral supplements?

Only if the base diet is not balanced (e.g., a BARF diet without bones or a mineral supplement). Commercial dog food that meets AAFCO/FEDIAF standards is generally sufficiently mineralized—additional mineral supplements are usually unnecessary and can lead to overdoses.

What happens if my dog gets too much calcium?

In adult dogs, excess calcium is often excreted through the kidneys—the risk is lower. In puppies of large breeds, excess calcium significantly increases the risk of osteochondrosis (OCD) and growth disorders. Do not give calcium supplements to puppies without first calculating their specific needs.

Related terms

• Calcium in Dogs
• Phosphorus in Dogs
• Vitamins for Dogs
• Raw Feeding for Dogs
• Crude protein in dogs

Sources & Further Reading

1. National Research Council. (2006). Nutrient Requirements of Dogs and Cats. National Academies Press. ISBN 9780309086288.

2. Dobenecker, B., Kasberger, J., & Kienzle, E. (2006). Effect of a high calcium diet on bone development and blood mineral concentrations in growing dogs. Journal of Animal Physiology and Animal Nutrition, 90(3–4), 182–186. https://pubmed.ncbi.nlm.nih.gov/16573684/

3. Schoenmakers, I., Hazewinkel, H. A. W., & Van Den Brom, W. E. (1999). Excessive calcium absorption in growing Great Danes in the intestinal phase: The mechanism for the excessive intestinal calcium absorption. Journal of Nutrition, 129(7 Suppl), 1914S–1915S. https://pubmed.ncbi.nlm.nih.gov/10419915/