Dogster is reader-supported. When you buy via links on our site, we may earn a commission at no cost to you. Learn more.

Dog Nutrition

6 Food High in Magnesium for Dogs: Vet-Reviewed Facts & FAQ

Kerry-Ann Kerr
By Kerry-Ann Kerr · Reviewed & fact-checked by Dr. Amanda CharlesVet Approved
Dr. Amanda Charles
Reviewed & Fact-Checked byDr. Amanda CharlesBVSc MRCVS (Veterinarian)
Dr. Amanda Charles, a 2002 graduate from Liverpool University, has built a prolific career in small animal medicine. She is passionate about providing pet owners with reliable and current information, enjoying the varied aspects of veterinary work. Outside the clinic, Amanda's life is filled with the energy of her two young sons, her spirited Cocker Spaniel, along with a spunky Ragdoll cat.View authorThe information is current and up-to-date in accordance with the latest veterinarian research. Learn more
Updated on June 29, 2026
Share
dog eating in a food bowl

Like humans, dogs require essential minerals and vitamins to function. Magnesium, along with calcium, phosphorus, and potassium, is an essential macromineral. It's important for bone formation, muscle, and nerve function. Magnesium must be included in the diet in sufficient amounts to avoid deficiencies. Commercially available complete dog foods contain enough magnesium for healthy dogs. A lack of magnesium in a dog's diet can occur for various reasons, including chronic diarrhea, kidney failure, and diabetes.

This article examines magnesium-rich foods. However, not all of these foods are suitable for all dogs, depending on their age and health condition. Always speak to a vet before adding additional foods to your dog’s diet, especially if your dog is showing any signs of illness.

Dogster_Website dividers_v1_Jan 18 2024-03

Top 6 Magnesium-Rich Food Sources for Dogs

1. Fish

Image Credit: Bakhrom Tursunov, Pixabay
Types:Mackerel, salmon, pollock
How to Prepare:Cooked and plain

You can select a fresh, boneless fish fillet, but check it for tiny bones before cooking it. Then, you can grill, poach, bake, or steam it without oil, pepper, salt, or onions and garlic1, which are toxic to dogs2. The fish's fins, head, bones, tail, and scales shouldn't be included because they pose a choking hazard and risk damage to the gastrointestinal tract.

It is important to avoid feeding your dog raw fish. Raw or undercooked fish can carry harmful bacteria such as salmonella and listeria, which are harmful to dogs and humans, especially children or people with compromised immune systems.


2. Organ Meats

Image Credit: Sergey Lapin, Shutterstock
Types:Liver, heart, kidneys
How to Prepare:Cooked or raw

Organ meats like liver, heart, and kidneys are rich in magnesium. The liver should be fed in small amounts and not every day. It contains a considerable amount of vitamin A, and consumption of large portions can lead to vitamin A toxicity.

If you serve raw organs, it is important to be aware that bacteria such as salmonella, E. coli, and listeria are commonly found in raw meat. Therefore, it's crucial to take precautions when handling and feeding raw meat, such as washing your hands after touching it and cleaning every surface it touches. Raw food is especially hazardous to children or people with compromised immune systems.

You don't need to feed your dog organs every day. Instead, aim for a variation in their diet. If this is the first time your dog has had raw meat, start with small amounts and gradually increase them.


3. Whole Grains

Image By: Bom taraissara, Pixabay
Types:Whole wheat, brown rice, barley
How to Prepare:Follow instructions and keep plain

You can prepare the grains similarly to how you cook them for humans; for example, you can boil rice in water. Avoid adding other ingredients like dairy or fats. Once it's prepared, you can add the rice to your dog’s food. You can also serve a small portion as a treat if your dog enjoys it. If feeding as part of a home-cooked diet, follow a recipe from a veterinary nutritionist to ensure your dog’s diet is balanced.


4. Beans

Image Credit: flockine, Pixabay
Types:Black beans, green beans
How to Prepare:Cook black beans and serve fresh green beans

Beans can be prepared for dogs the same way they’re cooked for people. Dogs can have beans that have been soaked and then cooked, but they shouldn't consume uncooked beans because they’re nearly indigestible.

Green beans are also a good option; despite their name, they aren’t in the bean family. You can serve them fresh or cooked, but avoid canned beans since they generally have added sodium and preservatives. The ideal option is to purchase fresh beans from the grocery store, but if you choose flash-frozen green beans, steam or microwave them to thaw them out until they’re ready to cook.


5. Vegetables

Image Credit: monicore, Pixabay
Types:Cucumber, spinach, peas
How to Prepare:Depends on the vegetable

Cucumbers are an excellent treat for your dog because there are only 8 calories per ½ cup. Make sure you cut the cucumber into manageable sizes, especially if you have a small dog or one that likes to wolf down their meals. The best way to prepare spinach for your dog is to steam it. Boiled spinach loses most of its nutrients, and raw spinach is hard to digest.

When you steam it, keep it plain and chop it so it’s easier for your dog to digest. You should only add small amounts of spinach to your dog’s diet since too much can damage the kidneys or cause digestive problems. Green peas are a healthy snack, and you can cook frozen, fresh, or thawed peas. Avoid canned peas since they have too much sodium.


6. Fruits

Image Credit: PublicDomainImages, Pixabay
Types:Bananas, cantaloupe, pumpkins
How to Prepare:Raw

You can serve several nutritious fruits to your pup. Bananas are a healthy snack you can mash up in your dog’s food, stuff into a dog toy like a Kong, or slice and freeze. However, it's best to avoid the peel; while it’s not toxic, it can be difficult to digest and could cause a blockage.

You can also cut up a cantaloupe into half-inch pieces and feed them to your dog. Make sure you remove the rind and seeds. If your dog is a little fussy, you can mash it up and add it to their food. Cooked pumpkin ( avoiding the stem, leaves, and skin) is safe for dogs and a source of magnesium, among other nutrients. You can also serve canned pumpkin as long as it is plain. Avoid pumpkin blends and mixes, such as pumpkin pie filling, which contains other ingredients that can harm dogs.

Remember, fruits are higher in sugar, so they should only be an occasional treat.

Frequently Asked Questions

Will My Dog Get Magnesium From a Commercial Dog Food Diet?

Magnesium is an essential mineral, and complete and balanced commercial pet foods should contain the right amounts to keep your dog healthy. There should be a breakdown of all the vitamins and minerals on the packaging, but you can speak to your vet if you have any concerns.

What Are the Signs of Magnesium Deficiency?

Magnesium deficiency, also known as hypomagnesemia, is rare and only occurs in very sick dogs. Sometimes, it doesn’t cause many signs, but low magnesium can worsen other conditions and lead to low blood levels of other important electrolytes such as potassium and calcium.

Signs that might be seen include:

  • Difficulty walking
  • Heart arrhythmia ( abnormal rhythm)
  • Lethargy/abnormal behavior
  • Loss of appetite
  • Muscle pain
  • Muscle weakness/trembling

Can Dogs Suffer From a Magnesium Overdose?

Excess magnesium in a dog’s body is known as hypermagnesemia. Conditions that can be associated with excess magnesium in the blood include kidney failure, Addison's disease, and hypothyroidism. Possible signs that your dog is suffering from hypermagnesemia are:

  • Low heart rate
  • Hypotension
  • Muscle weakness
  • Nausea
  • Respiratory depression
  • Vomiting

If your dog’s magnesium levels are high, they are at a higher risk of cardiac arrest, so you must contact a vet if you notice any of these signs.

Dogster_Website dividers_v1_Jan 18 2024-03

Conclusion

Magnesium is a very important mineral in your dog’s diet. If your dog is on a good quality complete dog food, they should be consuming the right amount. You can feed your dog various foods if you’re considering introducing more magnesium into their diet. It’s vital to include a vet in this decision. Any changes you make to your dog’s diet should be discussed with a vet to ensure it’s a good idea. Too much of anything, even something healthy, can become harmful, so you must serve the correct portions.

Sources

Featured Image Credit: dmytro Zinkevych, Shutterstock

Want content like this delivered to you?

News, insights, expert advice, and everything dog

Kerry-Ann Kerr
Authored by

Kerry-Ann Kerr

Join the Conversation

2 Responses

KG
Karen Gajewski says:
June 4, 2025

How do you measure how much they needs daily

Radim Chudej
Radim Chudej says:
June 24, 2025

Hello Karen, thank you for your question and sorry for a bit of a late reply. The specific dosage of food varies for ever dog, so this is something that should be consulted with a veterinary nutritionist. If you would like to talk to a veterinarian about this, I could recommend you to book an appointment with one of our professional veterinarians from PangoVet veterinary telehealth service at https://www.pangovet.com. They will gladly consult your dog's diet and nutrition and let you know what should the proper dosage be, specifically for your pup.

10 Foods With Potassium for Dogs: Vet-Verified Nutrition Facts

10 Foods With Potassium for Dogs: Vet-Verified Nutrition Facts

If your dog has hypokalemia or a low concentration of potassium in their bloodstream, your veterinarian may have recommended that you supplement your pet's reg…

Jordyn Alger
By Jordyn Alger · 2 weeks ago
6 Foods High In Thiamine for Dogs: Vet-Approved Vitamin B1 Sources

6 Foods High In Thiamine for Dogs: Vet-Approved Vitamin B1 Sources

Thiamine, also known as vitamin B1, is an essential nutrient for dogs and humans. Dogs require it for carbohydrate metabolism, optimal growth, and efficient ne…

Oliver Jones
By Oliver Jones · 1 day ago
Manganese for Dogs: Benefits, Vet-Reviewed Nutritional Information & Potential Issues

Manganese for Dogs: Benefits, Vet-Reviewed Nutritional Information & Potential Issues

Most dog owners are completely aware of the importance of the nutrients that are essential for keeping their dogs healthy—protein, fats, calcium, vitamin A, an…

Kathryn Copeland
By Kathryn Copeland · 2 weeks ago
Can Dogs Eat Bananas? Our Vet Explains Benefits & FAQ

Can Dogs Eat Bananas? Our Vet Explains Benefits & FAQ

A banana may be your go-to snack when you’re looking for something healthy, satisfying, and convenient. In fact, the fruit may be such a staple in your diet th…

Dr. Chyrle Bonk
By Dr. Chyrle Bonk · 2 weeks ago
June 29, 2026

6 Great Sources of Carbohydrates for Dogs: Vet-Verified Nutrition Facts

When it comes to dog nutrition, carbohydrates are a tricky subject. While canines can get energy from protein and fat, many dog food brands contain one or mult…

Jaimie Wisniowski
By Jaimie Wisniowski
6 Great Sources of Carbohydrates for Dogs: Vet-Verified Nutrition Facts
June 17, 2026

Dog Food Alternatives: 6 Vet-Approved Options

As a dog owner, you are probably familiar with the panic you feel when you realize you have run out of dog food and are unable to get more at the moment. You m…

Sarah Psaradelis
By Sarah Psaradelis
Dog Food Alternatives: 6 Vet-Approved Options
June 29, 2026

What Human Foods Can Dogs Eat? Vet-Reviewed Health & Nutrition Guide

Some dogs love to indulge in human foods, especially those that they shouldn’t eat for health reasons. For example, nachos, tacos, pizza, and burgers are all t…

Rachael Gerkensmeyer
By Rachael Gerkensmeyer
What Human Foods Can Dogs Eat? Vet-Reviewed Health & Nutrition Guide
June 29, 2026

Can Dogs Eat Green Beans? Vet-Approved Feeding Facts

Our canine companions are excellent at sneaking food off our plates or out of our hands, but human food isn’t always the best for them. Sometimes, our food has…

Misty Layne
By Misty Layne
Can Dogs Eat Green Beans? Vet-Approved Feeding Facts
June 29, 2026

Can Dogs Eat Mango? Vet-Approved Safety & Feeding Tips

No matter what you’re eating, your dog likely stares on with envy. Most dogs love to eat what their humans eat, but dogs have no idea if the food is good or ba…

Rachel Giordano
By Rachel Giordano
Can Dogs Eat Mango? Vet-Approved Safety & Feeding Tips
June 29, 2026

What Human Foods Can I Feed My Diabetic Dog? 6 Vet-Approved Options

Dogs can get diabetes just like humans can. It typically happens when they’re older, but if your pooch isn’t in good health, it can happen at any time. Providi…

Rachael Gerkensmeyer
By Rachael Gerkensmeyer
What Human Foods Can I Feed My Diabetic Dog? 6 Vet-Approved Options
June 29, 2026

What Fruits Can Dogs Eat? 13 Vet-Approved Options

Summer is right around the corner, and if you're anything like me, you're probably excited about all the in-season fruits you'll be able to eat soon. You might…

Chantelle Fowler
By Chantelle Fowler
What Fruits Can Dogs Eat? 13 Vet-Approved Options
June 29, 2026

Can Dogs Eat Pumpkin? Vet-Approved Nutrition & Health Facts

This delicious orange vegetable is non-toxic to dogs, but is it healthy for them to eat? The answer is yes! Pumpkins are enjoyed by people and their pets, and…

Keri-Beth Clur
By Keri-Beth Clur
Can Dogs Eat Pumpkin? Vet-Approved Nutrition & Health Facts

Love Dogs? So Do We! Join the Dogster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.

You may opt-out at any time. View our Privacy Policy for more information.

The Dogster app on a phone