The Best Calcium Supplements for Dogs (Review) in 2021

Last Updated June 7, 2021

Calcium plays a vital role in your dog’s diet. It provides a number of benefits, helping your dog to develop. This not only includes helping to build strong bones, but calcium also supports contractions in the heart muscle, which helps your heart to function, as well as helping with hormone secretion and supporting muscle building and nerve transmission. Read on to discover everything you need to know about ensuring your dog gets enough calcium, as well as the best calcium supplements on the market for dogs.

The Best Calcium Supplements for Dogs


Firstly, we have Animal Essentials Seaweed Calcium, which provides calcium that has been derived from a plant source, ensuring bio-availability and purity. It is harvested from the seabed’s off Ireland’s southwest coast, which are some of the purest and cleanest waters across the globe. Not only does this supplement come from a pure source, but it is easy to feed your dog as well. All you need to do is add one teaspoon to each pound of your dog’s home prepared diet.

The high digestibility of the product means a low amount is required per feed, which makes your money go further too. The powder is flavourless and virtually odourless, so you shouldn’t experience any resistance from your dog. Not only is this natural calcified red seaweed a great source of calcium, but it also provides zinc, boron, and magnesium too.

Harvested from some of the purest and cleanest waters in the world

Derived from a plant source

Flavourless and virtually odourless

High digestibility

Environmentally sustainable

Easy to feed

  • Brand: Animal Essentials
  • Model: JX0001
  • Weight: 12 ounces


As you probably gathered from the name of this product, it offers four supplements in one, meaning four times the benefit. NaturVet All-in-One 4-in-1 Support for Dogs provides support for overall health, joints, skin and coat, and digestion. It contains chondroitin, which providers extra support for your dog’s joints, ensuring healthy joint function. It also has a range of minerals and vitamins, including vitamin C and B2, which support overall health. Omegas-3 6 and 9 are included for a healthy and shiny coat and skin, as well as digestive enzymes to support a healthy digestive tract and proper digestion.

This supplement is designed for dogs that are over the age of 12-months. It comes in the form of a soft chew, which is easy for your dog to digest. Dogs up to 30 lbs. should have two soft chews per meal. Give four soft chews to your dog if it weighs between 31 and 50 lbs., give him six soft chews he weighs between and 51 to 75 lbs., and if your dog is over 75 lbs., eight soft chews are ideal. You can divide the chews between AM and PM if you would prefer.

Check out our article on the Best Dog Joint Supplements.

Four supplements in one

Give with each meal

Soft chew

Supports overall health, joints, skin and coat, and digestion

  • Brand: NaturVet
  • Model: 79903817
  • Weight: 1.25 pounds


Upco Bone Meal Steamed Bag Supplement is easy-to-use and completely natural. It promotes proper bone growth in growing dogs, as well as proper development of offspring. Not only does it offer a natural source of calcium, but also it contains phosphorus and other essential minerals that are necessary for fast growing puppies. It is a concentrated source, which is designed to be fed as a supplement to your dog’s regular diet.

It can also be given to cats. The product is brown, which is because it is natural and has not been bleached. Also, most customers have remarked that their dogs have enjoyed the taste of this product, which is always a big plus for pet owners, as it means you won’t have a struggle on your hands when getting your dog to consume the Upco Bone Meal Steamed Bag Supplement.

Supports proper bone growth in growing animals

Completely natural


Can also be given to cats

  • Brand: Upco
  • Model: 101365
  • Weight: 15.4 ounces


Next we have Sure Grow tablets, which are calcium, phosphorus, and vitamin supplements. These tablets are designed to promote optimal tendon, ligament, and bone development in puppies. The formulation is exclusive and unique, containing vitamin A and D, as well as phosphorus and calcium. The product is made in the USA, and it features a delicious flavour that dogs love. Sure Grow tablets promise fast results because they are fast absorbing. You can either mix the tablet wit food or you can feed it to your dog on its own.

How much you give your dog will depend on how much he weighs. If your dog weighs between five and 15 lbs., you should give him half a tablet twice per day. If your dog weighs between 16 and 30 lbs., give him one tablet twice per day. You should then give your dog one and a half tablets twice per day if your dog weighs between 31 and 60 lbs., and two tablets twice per day if your dog weighs between 61 and 100 lbs. This product can be especially beneficial for dogs that have poor ligament growth, rickets, lowered pasterns, bandy legging, cow hocking, and hip dysplasia. It is also recommended for lactating and pregnant bitches.

Calcium, phosphorus, and vitamin supplement

Fast absorbing

Fast results

Delicious flavour that dogs love

Exclusive and unique formulation

  • Brand: Lambert Kay


Nutrition Strength Calcium Phosphorus for Dogs Supplement

Specifically designed for growing puppies, to assistant in healthy, strong bone development. Nutrition Strength has formulated easy-to-administer tasty calcium chews that your pooch will love to chomp down on. Not only do the Nutrition Strength Calcium Phosphorus chews assist in bone development, however. Like any good supplement, they also work to strengthen the nervous system, to protect your pup as they grow and explore the world around them. With the human-grade, non-GMO ingredients, these chews guarantee your four-legged friend is getting the very best; and if you’re not happy with the results Nutrition Strength offers a 100% money-back guarantee.

Whilst they have been formulated with growing puppies in mind, these calcium supplements are suitable for dogs of all ages and sizes. In fact, they are particularly helpful for nursing mothers, as they help to stimulate hormone secretion and strengthen their bones and teeth, as breastfeeding can take its toll on a mother’s ability to properly absorb minerals for herself. 

365-day money-back satisfaction guarantee.

Chewable tablets for easy administering.

Human-grade non-GMO tablets.

Helps to stimulate hormone secretion.

Supports healthy bone development.

Strengthens the nervous system.

  • Brand: Nutrition Strength
  • Weight: 7.83 Ounces


Looking for high-quality, bio-available, plant-based calcium supplement for your dog? Nature’s Best Seaweed Calcium for Pets checks all the right boxes. This bundle includes two 14-oz jars full of beneficial nutrients for pets, including calcium, magnesium, phosphorus, selenium, iodine and 72 other trace marine minerals. The ingredients are 100% wild harvested Icelandic calcareous marine algae, so the product is vegan and of excellent quality. Nature’s Best Seaweed Calcium is also EU Health Certified and FDA GRAS approved, so maximum quality is ensured.

Completely natural, this supplement will help your pup build strong bones, teeth and nails, and will also promote heart health by supporting proper contractions in the heart muscle. The supplement is also great for nerve, skin and coat health, making it ideal for pets who eat solely or mostly homecooked meals.  To administer it, add one teaspoon for every 1.5 pounds of home prepared food – mix a little, and voila – your pet probably won’t even notice the supplement is there.

100% wild harvested Icelandic calcareous marine algae

Supports bone, teeth and nail health

Promotes heart, nerve and kidney health

FDA GRAS approved, EU Health certified

Plant-based, highly bio-available finely milled powder

  • Brand: American Pet Botanicals


Made from Lithothamnium calcareum, or red algae of the Corallinacea family, the Vitality Science’s Lithothamnium Calcium Supplement for Dogs is 100% natural and safe. Containing calcium, magnesium, phosphorus, iodine, zinc and other minerals, it promotes strong bones and healthy joints in both dogs and cats. The supplement is also beneficial for pets suffering from mild to chronic diarrhea as it’s very absorbent and able to dry liquid stools fast. Importantly, it’s free from any fillers and flowing agents so it’s perfectly safe even for sensitive dogs and cats.

The Lithothamnium Calcium supplement is made in the USA and formulated in small batches, so freshness is always guaranteed. It comes in a 5.3 oz jar or 150 g which is plenty of product. To use it, you should sprinkle it on your pet’s normal food (commercial dry or wet or homemade) once or twice a day. The recommended dosage is ¼ of a teaspoon for each 20 pounds of animal.

Seaweed harvested from the seabed from southwest Ireland

100% natural, plant-based

Supports bone and joint health

Promotes healthy digestion, helps with mild to chronic diarrhea

Finely milled powder, made in the USA

  • Brand: Vitality Science

Best Calcium Supplements for Dogs

It helps with…

  • Cell signalling
  • Muscle contraction
  • Nerve impulse transmission
  • Blood coagulation
  • Formation of teeth and bones

What are the Signs of a Calcium Deficiency?

If your dog does not get enough calcium, they can suffer from major skeletal abnormalities. This is because of a significant decrease in bone mineral content.

Golden retriever dog standing on grass

What are Calcium Supplements?

Calcium supplements are available in tablet, power and liquid form for your dog. They provide an extra dose of calcium for dogs that are deficient or require it for health reasons. Simply adding calcium supplements to your dog’s diet is not the norm. However, there may be cases whereby it is necessary. If you are unsure, the best thing to do is talk to your vet and they will be able to advise further.

Take a look at our latest guide on the Best Cranberry Supplements For Dogs.

What Quantity of Calcium Does Your Dog Need per Day

The recommended dose of calcium for a dog per day is 1 gram per average. This is according to the National Research Council, which is a division of the National Academy of Sciences. Nevertheless, this is just a general guideline, as there are a number of factors that influence how much calcium your dog requires. This includes the likes of condition, genetics, age, and breed. This is why it is wise to consult closely with a vet to find out how much calcium your dog should be getting. Your vet will be able to make certain that your dog has a diet that is customised for his needs while being nutritionally balanced. The National Research Council has stated for healthy adult dogs, you can calculate the right amount of calcium by giving your dog around 50 mg per kilogram of body weight.

Does my Dog need a Calcium Supplement?

There are a number of different ways that your dog can get calcium. This includes calcium supplements, but also whole foods and enriched dog foods. We will reveal the best natural food sources of calcium for your dog below. In terms of enriched dog food, you can buy dog food that contains the recommended dosage of calcium per day to make sure your dog gets the nutrients it needs this way. Of course, the other option is to give your dog a calcium supplement. Your dog does not need a calcium supplement, but it does need calcium, so it is up to you how you decide to make sure your dog gets this in their diet.

The best thing to do is consult with your vet. In most cases, supplements are best suited for dogs that have a calcium deficiency in their diet, as well as those with certain conditions. There are a number of situations whereby calcium deficiencies arise. Some dogs become deficient in calcium during lactation or pregnancy. Moreover, if your dog is on a raw food or homemade diet, there is a chance that he will not be getting enough calcium.

Are Calcium Supplements for Dogs Safe?

Calcium supplements are safe, so long as they are given to dogs sensibly. If you give your dog the recommended amount as instructed by your vet, then the calcium supplements will not have an adverse impact. However, if you give your dog too much calcium, this can create an imbalance or an overdose, which can be just as damaging as your dog not having enough calcium. If you look at a packet of calcium supplements, you will see that most have upward of 500 mg of calcium per tablet. This will become excessive over time if you are regularly giving it to an animal that does not have a deficiency in calcium. This is why you need to make sure you are giving your dog the right dosage. If you give your dog too much calcium, they could suffer some of the following side effects; kidney failure, kidney stones, upset stomach, vomiting, and nausea. If you continue to give your dog too much calcium for an extended period of time, this can result in hypercalcemia. This is the medical term for elevated calcium levels on dogs.

You may also like our ultimate guide on Dog Food for Kidney Disease.

What are Natural Sources of Calcium for Dogs

There are a number of natural sources of calcium for dogs, which you can include as part of their diet instead of giving them calcium supplements. This includes a variety of wholefoods, including dairy products, like cheese and yogurt. Nevertheless, you should ensure that your fluffy friend is not intolerant to lactose, as dairy can result in sensitivities in certain dogs. Other natural sources of calcium include fish, with salmon and tuna both being particularly rich in calcium, as well as beans, spinach, broccoli and other legumes, plus vegetables. Another natural calcium-rich food is to ground up eggshells and give this to your dog. Eggshells contain 50 mg of calcium per 3.50 oz. Yogurt contains 450 mg per 8 oz., cheese contains 204 mg per one oz., broccoli contains 40 mg per 3.5 oz., salmon has 10 mg per 3 oz., and finally, spinach contains 245 mg per 8 oz. this should give you a good idea regarding how much calcium your dog will get based on what you serve them.

Dogs Running on Beach Rocks

Read here our ultimate article on the Best Dog Food for Sensitive Stomachs.

Hopefully, you now have a better understanding regarding the importance of calcium in your dog’s diet and whether or not calcium supplements are the best source for this. If so, make sure you try one of the fix calcium supplements that have been presented for the best results.


  1. Low Blood Calcium in Dogs, PetMD
  2. Rania Gollakner, BS, DVM, Calcium Supplements, VCA
Eloise Hands
Eloise is the owner of a Malamute/Akita cross, a first-time mum, and an animal enthusiast from England. She comes from a family which has never gone a day without a pet (or 3!), and over the years has learned all the best tips and tricks to raising a difficult pet. A knowledge that she has put to good use, to help others navigate the limitless world of pet care.
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