Discovering the best calcium supplements for dogs is essential for pet owners seeking to support their furry companions’ health and well-being. Calcium plays a pivotal role in various physiological functions in dogs, such as bone formation, blood coagulation, muscle contraction, and nerve function. But not all dogs will need to take calcium supplements in life.

The necessity for calcium supplements can be influenced by numerous factors, including the dog’s age, life stage, existing health conditions, and diet. While some dogs might need supplements for conditions like hypocalcemia or during pregnancy and lactation, others may require them due to dietary imbalances or specific health issues. And you’ll read this more than once, but keep in mind, you must consult a veterinarian before introducing any new supplements, as excessive calcium can lead to health complications such as hypercalcemia and kidney stones.

In this article, we will explore a range of calcium supplements specially formulated for dogs, considering aspects such as ingredient quality, bioavailability, brand reputation, and the presence of other supporting nutrients like Vitamin D, magnesium, and phosphorus that aid in calcium absorption. Alongside, we’ll delve into reviews to provide insights into the real-world effectiveness of these supplements. Our goal is to assist you in making an informed decision in choosing a supplement that best meets your dog’s unique needs, ensuring they lead a healthy and balanced life.

calcium supplements for dogs


What Are Calcium Supplements for Dogs?

Calcium supplements for dogs are formulated to provide additional calcium to a dog’s diet. Calcium is a crucial mineral for dogs, as it is for humans, playing a vital role in various physiological functions such as bone formation, blood coagulation, muscle contraction, and nerve function.

Here are a few reasons why a dog might need calcium supplements:

  1. Bone Health:
    • Puppies, especially large breed puppies, need an appropriate balance of calcium for proper bone development.
    • Adult dogs might need supplements if they have a calcium deficiency or bone health issues.
  2. Pregnancy and Lactation:
    • Pregnant or lactating females may have increased calcium requirements. Growing puppies is hard work on a body!
  3. Health Conditions:
    • Some health conditions may either increase the need for calcium or interfere with calcium absorption, necessitating supplementation.
  4. Dietary Imbalance:
    • Dogs fed a homemade diet that is not properly balanced may require calcium supplementation.
  5. Hypocalcemia:
    • Dogs suffering from hypocalcemia (low levels of calcium in the blood) may require supplementation under veterinary supervision.

However, it’s essential to note that too much calcium can also be harmful, leading to conditions like hypercalcemia (elevated levels of calcium in the blood), which can cause kidney stones and other health issues. It is crucial not to give calcium supplements without the guidance of a veterinarian, who can determine whether supplementation is necessary based on the dog’s age, health condition, and diet.

Always consult your vet before starting any supplement regimen for your pet, as they can provide appropriate dosage recommendations and monitor your dog’s health during supplementation. The calcium requirements can vary depending on the dog’s age, size, breed, and overall health.

calcium for dogs

Buyer’s Guide: What to Consider When Choosing Calcium Supplements for Dogs

When choosing a calcium supplement for your dog, consider these important factors to ensure the supplement is safe and meets your dog’s specific needs.

Veterinary Advice

Always consult your veterinarian before starting any supplement to determine whether your dog actually needs additional calcium, the appropriate type of supplement, and the correct dosage.

Age and Life Stage

The calcium requirements of puppies, adult dogs, pregnant/lactating females, and senior dogs can vary significantly. Choose a supplement that is appropriate for your dog’s age and life stage.

Health Conditions

Consider any underlying health conditions your dog might have. Dogs with kidney disease, for example, may need to be monitored carefully if given calcium supplements. Pregnant and lactating females should also be closely monitored.

Dietary Needs

Assess the current diet of your dog to avoid over-supplementation. Dogs on a balanced commercial diet usually do not need additional calcium unless recommended by a veterinarian for specific health conditions.

Ingredient Quality

Look for supplements with high-quality ingredients and no harmful additives, fillers, or preservatives.


Choose a supplement with good bioavailability, meaning the calcium is in a form that is easily absorbed by the dog’s body.

Balanced Ratio with Phosphorus

Calcium and phosphorus work together in the body, and an appropriate ratio is important for optimal absorption and bone health.

Vitamin D Content

Vitamin D helps in the absorption of calcium. However, too much can be toxic, so it’s essential that any included vitamin D is at a safe level. Check with you veterinarian before giving your dog calcium or vitamin D.

Brand Reputation

Opt for a reputable brand known for quality and purity. Check for reviews, recalls, and any third-party testing or quality assurance.


While cost should not be the sole determining factor, it is practical to consider the price and whether it provides good value for the quality offered.

Ease of Administration

Consider whether the supplement is in a form that is easy to administer to your dog, such as chewable tablets, powder, or liquid.

Label Information

Read the label carefully for information on ingredients, dosage, and any warnings or contraindications.

Remember, the goal is to maintain a balanced intake of calcium to support your dog’s overall health. Too much or too little calcium can lead to health problems. Regular veterinary check-ups and blood tests can help monitor your dog’s calcium levels and overall health while using supplements.

The 8 Best Calcium Supplements for Dogs

#1 – NaturVet Calcium-Phosphorus For Dogs

NaturVet Calcium-Phosphorus For Dogs
  • Calcium and phosphorus for maximum absorption
  • Supports strong and healthy bones
  • Enhanced with essential minerals and Vitamin D
  • Powder form that easily mixes with food

NaturVet Calcium-Phosphorus for Dogs is a commendable product formulated to bolster strong and healthy bones in our canine companions. Enhanced with essential minerals and Vitamin D, this supplement ensures optimal absorption and utilization of calcium, promoting overall well-being. The product stands out as it contains no artificial colors, appealing to pet parents seeking a natural option for their dogs. Users have reported noticeable improvements in their dogs’ bone health and general vitality after regular usage. The inclusion of Vitamin D is a significant advantage, as it aids in calcium absorption, essential for dogs of all ages and sizes.


  • Promotes optimal calcium absorption and utilization
  • Suitable for dogs of all sizes
  • No artificial colors, making it a natural option


  • Lack of flavor options may be limiting for picky eaters
  • Not for puppies under 12 weeks

#2 – Animal Essentials Seaweed Calcium Supplement for Dogs & Cats

Animal Essentials Seaweed Calcium Supplement for Dogs & Cats
  • Derived from Iceland Seaweed
  • Contains essential minerals including magnesium, boron, and zinc
  • Suitable for both dogs and cats
  • Each batch tested for pathogens and chemical contaminants
  • Free of lead, hormones and other contaminants

Animal Essentials Seaweed Calcium Supplement for Dogs & Cats is a versatile and natural source of essential minerals derived from Iceland Seaweed, including magnesium, boron, and zinc. This 12 oz supplement is lauded for its quality and efficacy in promoting stronger bones in both dogs and cats. The blend of seaweed calcium and essential minerals ensures pets receive comprehensive bone support. Not only is it beneficial for bone health, but the inclusion of diverse minerals also promotes overall vitality. The product’s inclusion of Icelandic Seaweed indicates a commitment to purity and quality. It’s also certified clean and free of lead, hormones and other contaminants.


  • Natural and high-quality source of calcium
  • Environmentally sustainable
  • Recyclable zipper pouch
  • Powder form for easy food mixing


  • Unflavored, which might not appeal to all pets

#3 – Revival Animal Health Doc Roy’s Healthy Bones

Revival Animal Health Doc Roy's Healthy Bones
  • Calcium:phosphorus (1.29:1) ratio for maximum absorption
  • Available in 100 chewable tablets
  • Roast beef and liver flavor
  • Suitable for dogs, cats, kittens, and puppies

Revival Animal Health Doc Roy’s Healthy Bones is a reputable calcium phosphorus supplement designed for both dogs and puppies, available in a pack of 100 chewable tablets. The formulation supports the development of healthy bones, making it an excellent choice for growing puppies and adult dogs alike. Users have appreciated the product for its effectiveness in enhancing bone health and the convenience of chewable tablets. The supplement is fortified with the optimal balance of calcium and phosphorus, addressing the varied needs of dogs at different life stages.


    • Supports development of healthy bones
    • Convenient chewable tablet form
    • Suitable for all life stages


    • Could be expensive depending on dose required

    #4 – Pets Purest Calcium Phosphorus Zinc for Dogs & Cats Supplement

    Pets Purest Calcium Phosphorus Zinc for Dogs & Cats Supplement
    • Contains calcium, phosphorus, zinc, and vitamins A, B, D
    • 60mg calcium content
    • Available in 200 chewable tablets
    • Veterinarian developed for both dogs and cats

    Pets Purest offers a robust Calcium Phosphorus Zinc supplement for both dogs and cats, fortified with essential minerals and Vitamins A, B, and D. The product, available in a pack of 200 chewable tablets, aims to support strong and healthy bones and enhance overall health. The inclusion of a variety of vitamins and essential minerals makes this supplement a comprehensive choice for pet owners seeking multifaceted health benefits for their furry friends. Users report satisfaction with the product’s effectiveness and the visible improvements in their pets’ bone health and vitality. Despite its numerous advantages, some pet owners might find the tablet form less convenient for pets that are resistant to taking tablets.


    • Comprehensive formula with essential minerals and vitamins
    • Supports strong and healthy bones
    • Suitable for a variety of pets


    • Tablet form may not be suitable for all pets

    #5 – Pet’s Friend Eggshellent Calcium

    Pet's Friend Eggshellent Calcium
    • Fine eggshell powder calcium supplement
    • 1900mg of elemental calcium
    • Low phosphorous and non-bovine ingredients
    • No artificial ingredients or fillers
    • Suitable for dogs and cats as a food additive

    Pet’s Friend Eggshellent Calcium is a 6 oz fine eggshell powder calcium supplement, specially formulated for both dogs and cats. This product stands out due to its low phosphorous and non-bovine ingredients, making it a natural and unique option for pet owners. Designed to nourish muscles, joints, and bones, Eggshellent Calcium can be easily added to pet food, making it a tasty and convenient additive. Many users praise its palatability and effectiveness in enhancing their pets’ musculoskeletal health.


    • Natural and unique source of calcium
    • Supports muscles, joints, and bones
    • Fast absorbing formula
    • Easy to add to pet food


    • Lacks a variety of additional minerals and vitamins

    #6 – PetAg Sure Grow 100

    PetAg Sure Grow 100
    • Calcium & Phosphorus to support growing bodies
    • Addition of vitamin D for maximum absorption
    • Available in 100 flavorless tablets
    • Specially formulated for puppies

    PetAg Sure Grow 100 is a dedicated puppy vitamin supplement, available in a pack of 100 tablets, enriched with calcium and phosphorus. This product is specifically designed to meet the growing needs of puppies, aiding in the development of healthy bones and ensuring a balanced growth rate. Users have expressed satisfaction with the results, noting visible improvements in their puppies’ bone health and overall development. The supplement’s focus on calcium and phosphorus makes it a targeted choice for bone health.


    • Supports healthy bone development
    • Promotes balanced growth rate for puppies
    • Targeted formula for bone health


    • Tablet form can be less convenient for some puppies

    #7 – Nutrition Strength Calcium Phosphorus for Dogs Supplement

    Nutrition Strength Calcium Phosphorus for Dogs Supplement
    • 350mg calcium content
    • Phosphorus and vitamin D for better uptake
    • 120 chewable tablets
    • Grain free and gluten free
    • Made in the USA

    Nutrition Strength offers a Calcium Phosphorus supplement for dogs that aims to provide essential calcium for puppies and promote healthy dog bones and growth rate. Available in a pack of 120 chewable tablets, this dog bone supplement is designed to cater to the nutritional needs of both puppies and adult dogs. The chewable tablet form has been appreciated by pet owners for its convenience, and many report improvements in their dogs’ bone health and overall vitality. This supplement is a reliable choice for those looking to support their pets’ musculoskeletal development and well-being.


    • Supports healthy bones and growth rate
    • Convenient chewable form
    • Caters to both puppies and adult dogs


    • Could benefit from additional vitamins and minerals for broader health support

    #8 – Dog Greens Seaweed Calcium for Pets

    Dog Greens Seaweed Calcium for Pets
    • 1 teaspoon=1440mg of bioavailable calcium
    • Vet recommended and tested for purity
    • 100% wild-harvested Icelandic seaweed
    • Kosher, Halal, and EU Health certified
    • Allergen Free, GMO Free and Vegan

    Dog Greens Seaweed Calcium for Pets is a vet-recommended calcium supplement, available in a 14-ounce package, and is notably tested for purity, ensuring a quality product for your pets. Formerly known as Nature’s Best Seaweed Calcium, this supplement remains a popular choice among pet parents for its natural and potent source of calcium derived from seaweed. It supports strong and healthy bones and is suitable for both dogs and cats, making it a versatile addition to your pet’s diet.


    • Easy to use tasteless powder
    • Natural and high-quality source of calcium
    • Supports strong and healthy bones
    • Suitable for both dogs and cats


    • Some might prefer a flavored or enhanced formula

    FAQs About Calcium for Dogs

    Is it safe to give my dog calcium supplements without consulting a vet?

    It is not advisable to give your dog calcium supplements without consulting a veterinarian, as inappropriate supplementation can lead to various health issues such as hypercalcemia, kidney stones, skeletal problems, and other metabolic imbalances. A vet can assess whether your dog truly needs additional calcium based on their age, health, diet, and specific requirements, and provide appropriate dosage recommendations.

    How much calcium does my dog need?

    The amount of calcium a dog needs varies depending on factors such as age, size, breed, life stage, and health condition. Generally, adult dogs require around 1 gram of calcium per 1 kg of body weight, but puppies, pregnant or lactating females, and senior dogs may have different requirements. A veterinarian can provide individualized recommendations based on a dog’s specific needs and regular diet.

    Can too much calcium be harmful to my dog?

    Yes, excessive calcium can be harmful to dogs, potentially leading to conditions such as hypercalcemia, urinary stones, kidney dysfunction, and skeletal deformities, particularly in growing puppies. It is crucial to maintain a balanced intake of calcium and not to supplement without veterinary guidance, as an excess of calcium can disrupt the balance of other essential minerals in the body.

    Are there any signs or symptoms that might indicate my dog needs calcium supplements?

    Signs that might indicate a dog needs calcium supplements include weakness, muscle tremors, restlessness, lethargy, and loss of appetite. In severe cases, a calcium deficiency can lead to abnormal bone development and fractures. However, these symptoms can also indicate other health issues, so it’s important to consult a veterinarian for an accurate diagnosis and appropriate treatment.

    How long does it take to see the effects of calcium supplementation in dogs?

    The duration to see the effects of calcium supplementation in dogs can vary depending on the reason for supplementation, the dog’s overall health, age, and the presence of any underlying conditions. Some dogs might show improvement within a few weeks, while others might take several months, especially in cases of bone development and healing. Regular veterinary monitoring is essential to assess the effectiveness of the supplementation and adjust the dosage if needed.

    Can I use human calcium supplements for my dog?

    It is not recommended to use human calcium supplements for dogs, as the dosage and formulation may not be suitable, and some may contain additives or ingredients that are harmful to dogs. There are specially formulated calcium supplements available for dogs, and a veterinarian can recommend an appropriate product based on your dog’s specific needs.

    How can I ensure my dog is absorbing the calcium supplement properly?

    To ensure proper absorption of calcium, it is important to maintain a balanced ratio of calcium to phosphorus, provide adequate levels of vitamin D, and consider the presence of other supporting nutrients like magnesium. Regular veterinary check-ups and blood tests can help monitor calcium levels and assess whether the supplementation is effective and safe for your dog.

    calcium supplements for dogs

    Final Thoughts

    In conclusion, selecting the best calcium supplements for dogs is a significant step in fostering your pet’s health and ensuring they receive the right balance of essential nutrients. Always consult with a veterinarian to determine the necessity, type, and dosage of calcium supplements suited to your dog’s individual requirements and health condition. By being informed and proactive, you can help your furry companion maintain strong bones, a robust muscular system, and overall well-being, allowing them to lead a happy and active life by your side.

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