What raises calcium levels in dogs?

Calcium is vital for a dog’s bones, muscles, and nerves, but too much can spell trouble. One common culprit is diet. Many owners in Europe and North America swear by raw food diets, but some commercial raw mixes or homemade blends loaded with bone meal can tip the scales. A Labrador in Manchester made headlines last year after developing kidney issues—vets traced it to a raw diet with excessive ground bones, a mistake that violates the UK’s Pet Food Regulations requiring balanced nutrient profiles.

Supplements are another risk. It’s easy to overdo it when trying to boost a puppy’s growth or support an older dog’s joints. In Germany, where pet supplement use is widespread, a 2023 survey found 1 in 5 owners gave calcium pills without vet approval. This can lead to hypercalcemia, which strains the heart and kidneys over time.

Certain medical conditions also drive calcium up. Cancer, especially lymphoma, often disrupts calcium regulation in dogs. So do kidney stones and infections, which can cause the body to retain more calcium than it should. In some cases, endocrine disorders like hyperparathyroidism trigger excess calcium release from bones into the bloodstream.

Medications matter too. Some diuretics or vitamin D supplements prescribed for other issues can inadvertently raise calcium levels. It’s why vets in France and Spain stress checking drug interactions before starting any new treatment—staying compliant with EU veterinary guidelines isn’t just about following rules; it protects your dog’s health.

Spotting the signs early helps. Lethargy, increased thirst, or loss of appetite might signal high calcium. If you notice these, a simple blood test can confirm levels. Always work with a vet to adjust diet or supplements—what works for one breed might harm another, and local regulations often reflect regional health risks, from common toxins to breed-specific vulnerabilities.

Keeping calcium in balance is key. It starts with understanding what goes into your dog’s bowl, questioning unproven supplements, and staying alert to changes in behavior. After all, a healthy dog isn’t just about avoiding illness—it’s about thriving, in line with the care standards that make our communities safe for pets and people alike.