Best Low Phosphorus Dog Food: Guide to Kidney-Friendly Meals

Just like humans, dogs have specific requirements for different nutrients in their diet. Phosphorus is one of those nutrients that, while essential, needs to be in balance with the rest of your dog’s nutrition.

Keep reading to learn more about low-phosphorus diets and kidney disease in dogs – you’ll also receive recommendations for our top choices in low phosphorus dog food.

Food	Type	Prescription?	Phosphorus	Protein	Where to buy
Blue Buffalo NVD KS Kidney Support	Dry (also wet)	Yes	0.37% (dry matter)	16.9% (dry matter)	Amazon
SquarePet VFS Low Phosphorus	Dry	No	0.45% max (as fed)	14% min (as fed)	Chewy · Amazon
Dave’s Restricted Diet Farmyard Blend	Wet (in sauce)	No	Restricted (check the can’s label)	Restricted	Chewy · Amazon

What vets recommend for kidney disease: The International Renal Interest Society (IRIS) staging guidelines recommend a kidney (renal) diet for dogs with chronic kidney disease, and a clinical trial in dogs with moderate kidney disease found that a renal diet with restricted phosphorus and protein and added omega-3s reduced kidney crises and kidney-related deaths compared with a regular adult food (Jacob et al., JAVMA, 2002). Your vet will check blood phosphate and may add a phosphate binder if diet alone isn’t enough. Don’t switch a healthy dog to a low-phosphorus diet without a reason; restricting phosphorus is meant for dogs with kidney problems.

What is Low Phosphorus Dog Food?

In the simplest of terms, a low-phosphorus dog food is just that – a food that is low in phosphorus. Phosphorus is an essential nutrient that works with calcium to keep your dog’s bones healthy and strong.

Your dog needs slightly less phosphorus than calcium, but he still needs a significant amount of phosphorus in his diet unless, of course, it starts to cause problems. As your dog gets older, his needs for both calcium and phosphorus start to decrease.

At the height of his growth and development, a dog needs about 1.0% to 1.8% calcium in his diet and somewhere between 0.8% and 1.6% phosphorus. Once your dog reaches half his adult size, his needs drop to 0.8% to 1.5% calcium and 0.6% to 1.2% phosphorus.

As an adult, they drop even more to 0.5% to 0.9% calcium and 0.4% to 0.8% phosphorus. In dogs that already have kidney disease, the kidneys can’t clear phosphorus well, and extra dietary phosphorus can speed the disease along; that is when a low-phosphorus diet helps.

Leading Low Phosphorus Dog Food Brands

If your dog needs a low-phosphorus diet, your veterinarian can prescribe one. Prescription renal diets are the most thoroughly tested option for dogs with kidney disease; a few non-prescription foods also restrict phosphorus.

Ingredient quality and balanced vitamins and minerals still matter, and not every food below is a kidney diet (see the note under the comparison table above). Here are the foods we looked at:

 

1. SquarePet VFS Low Phosphorus Formula

This product is specially crafted to meet the unique dietary needs of dogs requiring restricted levels of protein, phosphorus, and sodium.

Made in the USA, this premium kibble is ideal for pups with special nutritional needs, offering a carefully balanced formula that supports overall health without compromising on taste.

The recipe features wholesome ingredients like brown rice, turkey, whole egg, sweet potato and salmon oil, which provide essential nutrients while being gentle on digestion.

Designed with veterinary expertise, this diet ensures your dog receives optimal nutrition, even when dietary restrictions are necessary.

SquarePet is a family-owned company dedicated to providing pet parents with scientifically backed, premium-quality pet food.

Combining a deep understanding of pet nutrition with a commitment to using responsibly sourced, high-quality ingredients, SquarePet creates formulas that prioritize your furry companion’s health and happiness.

With this formula, you can feel confident that you’re feeding your dog a food that is not only effective but also crafted with care and integrity.

2. Wysong Synorgon Dry

The Wysong company offers holistic, healthy pet foods and supplements. This company was founded in 1979 and has been one of the true pioneers of the pet food industry, producing all-natural and holistic products for dogs and cats as well as horses, ferrets, and other animals.

Wysong takes the health and wellness of pets very seriously which is why they are so careful with the formulation of their recipes. Each product is developed in-house and made with the finest ingredients available to ensure complete and balanced nutrition for all pets.

This company offers an assortment of dry dog food products as well as canned foods, raw foods, and treats. It is also worth noting that many of their products are formulated for feeding to both cats and dogs.

If you are shopping for a high-quality dog food for a dog with kidney problems, this recipe might be a good choice. This formula is a chicken-based, premium pet food loaded with omega fatty acids plus other vitamins, minerals, and antioxidants.

With controlled levels of protein and phosphorus, this recipe will support your dog’s kidney health as well as his total body health and wellness through the use of natural ingredients.

This formula features digestible carbohydrates like brown rice, peas, and flaxseeds with fresh and dried fruits and vegetables for additional support.

You’ll be glad to know that it is supplemented with chelated minerals as well as dried fermentation products which act as probiotics to support your dog’s healthy and regular digestion.

3. Blue Buffalo BLUE Natural Veterinary Diet KS Formula

The Blue Buffalo pet food brand is widely known for the quality and variety of their product choices. This brand believes that pets are members of the family and should be treated as such – this means offering them a high-quality diet that meets their individual nutritional needs.

Blue Buffalo pet foods are made from the finest natural ingredients and they are combined in perfect balance in keeping with a holistic approach to pet nutrition. Premium-quality proteins are the foundation of every recipe and they are supplemented with digestible carbohydrates, fresh fruits and veggies, and healthy fats.

Something else that makes this brand unique is the fact that they supplement each of their recipes with LifeSource Bits – these are made up of a blend of vitamins, minerals, and antioxidants to support your dog’s whole body health and wellness.

If you’re looking for a low-phosphorus dog food for your pup, consider this product. This formula is a veterinary diet but it offers much higher quality than most of the prescription dog foods out there.

For one thing, it starts with a premium protein (deboned chicken) and doesn’t contain any byproducts, fillers, corn, wheat, or soy. This recipe is supplemented with digestible carbohydrates like pea starch and potato starch as well as healthy fats from chicken fat, fish oil, and flaxseed.

To support your dog’s kidney health, this recipe has controlled levels of protein and minerals, plus there are plenty of vital nutrients for nutritional balance. This recipe is also grain-free and loaded with natural flavor your dog is sure to love.

4. Natural Balance LID Sweet Potato & Venison Formula

The Natural Balance company was founded in 1989 and is known to craft products that meet high taste, safety, and nutritional standards. Also known as “animal health science experts,” the brand has a team of veterinary technicians that are ready to help you find the best food for your pet.

The Natural Balance Lab is an ISO 17025 accredited laboratory and one of the most technologically-advanced in the industry. Each of their products are rigorously tested for nine different toxins before they reach you to make sure you get nothing but safe and purely nutritious dog food.

Unlike other pet food brands, Natural Balance does not ever include by-product meals or artificial chemicals and preservatives.

Their Limited Ingredient Diet range is one of the first in the industry. The foods are designed to have limited animal protein sources (so you can easily check the ingredients for possible allergens), improve the health of the skin and coat, and support healthy digestion.

For this recipe, sweet potatoes make the bulk of the meal quickly followed by venison. Sweet potatoes are particularly good sources of fiber, which are essential for a good digestion. They also have good amounts of vitamins A, B6, and C but are low in fat.

Venison is a good animal protein source, particularly for dogs who are food-sensitive. Since it’s not a common meat unlike beef and chicken, for many canines venison is a novel protein.

If your dog is suffering from kidney issues, this diet may be the best for him. The animal protein only takes second place to a carb ingredient. There’s enough protein to meet his daily requirements but not so much (20% only) as to make your pet feel sick.

There are some studies that suggest omega-3 fatty acids taken from fish oil may benefit kidney disease sufferers. This recipe contains salmon oil, and its omega-3 fatty acid content is pegged at .5% minimum. Another benefit of omega-3 fatty acids are shiny healthy coats and skin that is less inflamed or itchy.

Even with the limited ingredients, this formulation manages to provide a high amount of quality nutrition for dogs of all breeds.

5. Royal Canin Veterinary Diet Hydrolyzed Protein Moderate Calorie

The Royal Canin brand was started by a French veterinarian named Jean Cathary in 1968. With over 50 years of experience, the company has learned that even the smallest amount of nutritional difference can impact your dog’s life and health in a huge way. Royal Canin products are crafted based on this finding of ‘tailored nutrition.’

Each of the brand’s numerous recipes are formulated by experts in the field to deliver exact levels of fiber, vitamins, prebiotics, and minerals to your pets to meet each of their unique needs.

There are recipes designed to meet the specific requirements of different breeds, ages, or lifestyle.

The company has meticulous production and sourcing standards to ensure your dog only gets the very best. It has a sample of every material that it uses and keeps these for two years so that all ingredients are fully traceable for the duration of a product’s shelf life.

This recipe starts with brewers rice. (Diets that are meant to aid dogs with kidney issues usually start with a grain or grain alternative to minimize the protein content.) Brewers rice is broken pieces of white rice that contain the same amount of nutrients that white rice has. (Not much, but white rice is good for pups with sensitive tummies.)

The hydrolyzed proteins (21%) come in second place. They make it easier for canines who have trouble digesting conventional food sources of protein. Hydrolyzed proteins are, to put it simply, broken down proteins that make it easy for bodies to absorb. These proteins are also less likely to cause an allergy or trigger a reaction than traditional proteins in sensitive pups.

Not only is the phosphorus and protein contents in this recipe low, but so are the calories. At 307kcal per cup, it fully supports dogs who need to maintain a healthy weight.

Yet despite the low calorie and fat content, it has more than enough of other necessary nutrients that dogs need to live a healthy and active life. (There are plenty of B vitamins, fibers, and omega and amino acids.)

Specifically formulated for dogs with skin, digestive, and food sensitivity issues, this specialized diet can only be purchased with your veterinarian’s authorization. It’s designed to meet the needs of all adult dogs regardless of breed.

6. Dave’s Pet Food Restricted Diet Farmyard Blend in Sauce

Dave’s Pet Food prides itself on producing wholesome and delicious pet foods that are affordable. The recipes are developed by world-famous nutritionists who know what dogs need to thrive.

Rarely does healthy and truly nutritious pet food combine with the word ‘affordable’, but the brand sticks to its mission of getting you the products you deserve at prices you can afford.

The company has a wide variety of offerings for pets with differing lifestyles, ages, conditions, and restrictions. It also has a restricted diet catalog that caters to specific medical needs.

Made specifically for canines who are battling kidney disease, this recipe has restricted amounts of phosphorus and protein. (Too much protein can cause the kidneys to go on work overload and will add to the buildup of waste in the blood. A low phosphorus level can also slow the progression of kidney disease.)

The first ingredient here is chicken broth, giving your pet essential moisture that keeps him hydrated and reduces the risk for urinary tract infections and kidney stones. It’s followed by peas, a plant source of protein and an easily digested veggie that also comes with fiber, zinc, iron, potassium, and magnesium.

But our pets deserve some quality fresh meat, even if these shouldn’t make up the bulk of the meal. There is fresh chicken here and fresh chicken liver (liver is an exceptional organ that contains a lot of nutrients — much more than muscle meat). The chicken liver, aside from giving nutrients, can help your dog eat more because it adds palatability to the food.

The recipe is a fully balanced meal that makes use of several veggies for their plentiful nutrient content. These are potatoes, carrots, and parsley. There are also two types of oil included in the formulation: salmon and sunflower oils. These provide all of the omega fatty acid needs of your canines to keep their skin and coat healthy.

High salt diets can worsen kidney damage and increase your pet’s blood pressure. To help normalize your dog’s blood pressure level, this formulation has a reduced sodium content.

Unlike some restricted diets that need your veterinarian’s authorization, you can freely buy this dog food without it. However, it is still best to consult with your vet on the most appropriate approach to treating your pet’s kidney issues.

7. Blue Buffalo Life Protection Formula Lamb & Bro