12 Best Low Phosphorus Dog Food in 2021

ALSO CONSIDER: Best Dog Food by Ingredients | Best low protein dog food | Best low residue dog food

This is our 2021 review of the best low phosphorus dog food.

Phosphorus plays a vital role in many dog’s diets by supporting bone development and motor functions. However, some dogs need to be on a low phosphorus diet to manage their kidneys effectively.

Most low phosphorus dog foods can only be bought with a veterinarian prescription.

I spent the past few days researching the best low phosphorus dog foods so that you can find a suitable option for your dog.

Overall, I found Blue Buffalo Natural Veterinary Diet KS Kidney Support Dog Food to be the best option currently on the market.

But each dog is different. So I have reviewed the best low phosphorus dog foods for each scenario to help you make the best decision for your pup.

Honest Whiskers Best Low Phosphorus Dog Food for 2021

  1. Blue Buffalo Natural Veterinary Diet KS Kidney Support Grain-Free Dry Dog Food (Best Overall Low Phosphorus Dog Food)
  2. Zignature Limited Ingredient Formula Trout & Salmon Meal Dry Dog Food (Best Budget Low Phosphorus Dog Food)
  3. Purina Pro Plan Veterinary Diets NF Kidney Function Dog Food (Best Premium Low Phosphorus Dog Food)
  4. Blue Buffalo Natural Veterinary Diet KS Kidney Support Canned Dog Food (Best Wet Low Phosphorus Dog Food)
  5. Nulo Freestyle Turkey & Sweet Potato Grain-Free Dry Puppy Food (Best Low Phosphorus Dog Food for Puppies)
  6. Royal Canin Veterinary Diet Renal Support S Dog Food (Best Low Phosphorus Dog Food for Seniors)
  7. Royal Canin Veterinary Diet Urinary SO Small Breed Dry Dog Food (Best Low Phosphorus Dog Food for Small Breeds)
  8. Hill’s Prescription Diet Kidney Care Dog Food (Best Low Phosphorus Dog Food for Large Breeds)
  9. Hill’s Prescription Diet c/d Multicare + Metabolic, Urinary + Weight Care Dry Dog Food (Best Low Phosphorus Dog Food for Weight Control)
  10. Natural Balance L.I.D. Limited Ingredient Grain-Free Salmon Formula Dog Food (Best Low Phosphorus Dog Food for Sensitivities)
  11. Hill’s Prescription k/d Kidney Care + Mobility Care Chicken Dog Food (Best Low Phosphorus Dog Food for Joints)
  12. Hill’s Prescription Diet c/d Multicare Urinary Care Dog Food (Best Low Phosphorus Dog Food for Urinary Health)

10 Best Low Phosphorus Dog Food Reviewed

All of the dog foods we are about to go through meet AAFCO recommended daily nutrient profiles for dogs. Before switching your dog’s food, consult a veterinarian. [1]

Blue Buffalo Natural Veterinary Diet KS Kidney Support Grain-Free Dry Dog Food

Phosphorus Content:

0.25% min – 0.55% max

Suitable For Breed Sizes:

Small Breeds, Medium Breeds, Large Breeds

Key Features:

Grain-Free, No Corn No Wheat No Soy, Veterinary Diet

First Five Ingredients: Deboned Chicken, Potato Starch, Pea Starch, Peas, Potatoe

Guaranteed Analysis: 14% Protein, 18% Fat, 7% Fiber, 10% Moisture

Estimated Carbohydrates: 51%

Caloric Content: 3,879 kcal/kg, 404 kcal/cup

Pros

  • Low 0.25% minimum phosphorus content
  • Uses deboned chicken as the primary source of protein
  • Excludes grains, corn, soy, and wheat
  • Increased fiber content to aid digestion
  • Fish oil and flaxseed used to give dogs moderate amounts of omega-3 fatty acids

Cons

  • Uses potatoes which may trigger adverse reactions

Many reviewers will recommend this dog food because of its high-quality contents and overall nutritional support for a low phosphorus diet. Kelp and turmeric help provide the formula with vital nutrients that support renal functionality.

Too much protein can have a detrimental effect on strained kidneys. So it’s no surprise that the formula features a low 14% protein from the deboned chicken. 

Dogs that suffer from renal conditions will find enough amino acids and nutrients from this white meat like L-carnitine, which helps maintain muscle mass and daily activities.

Low phosphorus diets or specifically formulated foods for kidney conditions will typically not feature real meat as a first ingredient, but this formula does.

This low phosphorus dog food uses a maximum of 0.55% phosphorus, ideal for renal health conditions. Moderate phosphorus levels ensure there isn’t excessive stress placed on kidneys. [2]

Blue Buffalo uses potatoes as a carbohydrate source while excluding grains, corn, soy, and wheat. 

Added fish oil and flaxseed ensure there is a steady supply of omega fatty acids in the recipe. These beneficial fats produce natural oils in your dog’s skin which help prevent inflammation. Chicory root aids digestion by developing beneficial bacteria in your dog’s gut.

Dog owners with sensitive dogs highly recommend this formula because it excludes grains and by-products. Many reviews share stories of improvements in their dog’s overall health.

Zignature Limited Ingredient Formula Trout & Salmon Meal Dry Dog Food

Phosphorus Content:

1.0% min

Suitable For Breed Sizes:

Small Breeds, Medium Breeds, Large Breeds

Key Features:

Low Glycemic, Grain-Free, Limited Ingredient Diet, Gluten Free, No Corn No Wheat No Soy, Chicken-Free, Natural

First Five Ingredients: Trout, Salmon Meal, Chickpeas, Peas, Sunflower Oil

Guaranteed Analysis: 31% Protein, 14% Fat, 4% Fiber, 10% Moisture

Estimated Carbohydrates: 41%

Caloric Content: 382 kcal/cup

Pros

  • Low 1% min phosphorus content
  • Uses high-quality ingredients
  • High amounts of omega-3 fatty acids

Cons

  • Uses peas which may be unsuitable for dogs with allergies
  • High 31% protein
  • 1% phosphorus content is slightly higher compared to other formulas

Made in the USA, this limited ingredient diet uses high-quality ingredients like whole fruits and vegetables to ensure your dog gets their daily nutrient requirements.

The source of the 31% protein content in the recipe comes from trout and salmon meal, providing essential amino acids and fatty acids necessary for overall health. 

Trout is also a rich source of B vitamins, niacin, and selenium. 

Peas and chickpeas are the primary sources of fiber and carbohydrates in the formula. These vitamin-dense ingredients provide potent antioxidants that prevent free radical tissue damage. [3]

Notably, the formula contains a slightly higher 1% minimum phosphorus content, meaning this diet is unsuitable for dogs with severe kidney conditions like chronic kidney disease. [4]

With over 96% of dog owners recommending this formula, numerous stories mention it being a massive hit with picky eaters. 

It is a suitable formula for sensitivities because it excludes grains and common allergens like chicken. Still, as previously mentioned, it isn’t a formula for dogs with severe kidney-associated conditions.

Purina Pro Plan Veterinary Diets NF Kidney Function Formula Dry Dog Food

Phosphorus Content:

0.4% max

Suitable For Breed Sizes:

Small Breeds, Medium Breeds, Large Breeds

Key Features:

Low-Protein, Pea-Free, Veterinary Diet

First Five Ingredients: Whole Grain Corn, Brewers Rice, Dried Egg Product, Animal Fat, Sugar

Guaranteed Analysis: 12.5% Protein, 13% Fat, 2.5% Fiber, 12% Moisture

Estimated Carbohydrates: 60%

Caloric Content: 4,091 kcal/kg, 478 kcal/cup

Pros

  • Low 0.4% maximum phosphorus content
  • High amounts of omega-3 fatty acids and sodium
  • Excludes legumes
  • Ideal protein amount for low phosphorus dog food.

Cons

  • Fairly expensive
  • Uses grains as a main protein source
  • 1% phosphorus content is slightly higher compared to other formulas

While this veterinarian prescribed diet contains the optimal amount of protein to support the renal conditions, it also contains optimal omega-3 fatty acids and sodium.  

Many diets will use meats as a primary source of protein. But this formula uses whole grain corn and brewers rice to provide a steady energy source for your pup. These plant-based ingredients are also rich sources of vitamins and minerals.

Dried egg product and whey are used in the formula to contribute healthy fats without severely increasing protein. [3

As a result, this helps keep the protein content low at 12.5%, an optimal level for kidney conditions. 

Added animal fat contributes omega-3 fatty acids; however, the formula also uses fish oils and vegetables to add to the 13% fat content.

This low phosphorus diet is an expensive option for dog owners. Still, vets and nutritionists frequently recommend this dog food because of its 0.4% phosphorus and sodium content. It is also an excellent option for picky eaters because of the added animal fat. 

Unfortunately, dogs that suffer from digestion issues may find this diet unsuitable because of the low 2.5% fiber and high sugar.

Blue Buffalo Natural Veterinary Diet KS Kidney Support Canned Dog Food

Phosphorus Content:

0.08% min

Suitable For Breed Sizes:

Small Breeds, Medium Breeds, Large Breeds

Key Features:

Grain-Free, No Corn No Wheat No Soy, Veterinary Diet

First Five Ingredients: Chicken, Chicken Broth, Water, Potato Starch, Potatoes

Guaranteed Analysis: 3% Protein, 2.5% Fat, 3% Fiber, 78% Moisture

Estimated Carbohydrates: 13.5%

Caloric Content: 949 kcal/kg, 336 kcal/can

Pros

  • Extremely low 0.08% phosphorus content
  • Uses meat as a main source of protein
  • Excludes grains
  • Use whole fruit and vegetables to provide antioxidants
  • Most wet formulas appeal to picky eaters

Cons

  • Uses potato as a carbohydrate source, making it unsuitable for sensitive dogs.

Another veterinarian prescribed diet, this grain-free formula by Blue Buffalo, features an impressive array of nutrients and vitamins needed to support daily renal activities. 

Many picky eaters will find wet food diets a suitable option because of their unique texture and taste. It is worth noting that the higher 78% moisture will lower the crude percentages compared to other dry kibble formulas. 

Real chicken is used as a primary source of the 3% protein content, but this is 13.64% on a dry matter basis. This lean animal meat provides essential amino acids that will prevent placing excess strain on kidneys.

Chicken is rich in L-carnitine, which promotes lean muscle development in low-protein dog food. 

Potatoes are included in the recipe to provide a steady source of carbohydrates. Whole carrots and peas are used to prevent free radical damage because they are rich in antioxidants. Free radicals are the by-products of protein digestion. [4]

Many pet parents recommend this formula for picky eaters. And the exclusion of common allergens and by-products makes it a suitable choice for sensitive dogs.

Nulo Freestyle Turkey & Sweet Potato Grain-Free Dry Puppy Food

Phosphorus Content:

0.9% min

Suitable For Breed Sizes:

Small Breeds, Medium Breeds, Large Breeds

Key Features:

Grain-Free, Gluten Free, High-Protein, Low Glycemic

First Five Ingredients: Deboned Turkey, Turkey Meal, Salmon Meal, Chickpeas, Chicken Fat

Guaranteed Analysis: 33% Protein, 18% Fat, 4% Fiber, 10% Moisture

Estimated Carbohydrates: 35%

Caloric Content: 3,742 kcal/kg, 441 kcal/cup

Pros

  • Free from chicken, eggs and common allergen ingredients
  • Made using low-glycemic ingredients
  • Added calcium to support bone development
  • 0.5% minimum omega-3 fatty acid content
  • Uses whole vegetables to support immune health

Cons

  • 33% protein is high for a low phosphorus dog food
  • 0.9% minimum phosphorus content is slightly higher than other options
  • Probably better suited as a meal to prevent kidney disease rather than supporting
  • Initial gassiness when switching

This low phosphorus diet from Nulo is an excellent choice for your puppy because of its optimal levels of omega-3 fatty acids and calcium.

Deboned turkey and turkey meal provide sources of protein and glucosamine, an amino sugar that naturally occurs in cartilage tissue and aids joint and bone development in growing pups. 

Glucosamine and chondroitin also help prevent conditions such as osteoarthritis from developing, in addition to the moderate 1% minimum calcium content. [5]

Whole fruits and vegetables like carrots, peas, tomatoes, apples, and blueberries help manage oxidative tissue damage because of the higher 33% protein content. These antioxidants also aid a puppy’s overall immune health.

Salmon meal is included to bolster the 0.5% minimum omega-3 fatty acid content of the recipe. Fatty acids like DHA help develop healthy skin and coats.

This recipe by Nulo does contain a slightly higher 0.9% min phosphorus content, meaning it may be better suited as food that prevents kidney-associated conditions. 

Many picky eaters love the diet because of its unique flavor. Some pet owners noticed initial gassiness when switching to this low phosphorus dog food.

Royal Canin Veterinary Diet Renal Support S Dry Dog Food

Phosphorus Content:

0.42% max

Suitable For Breed Sizes:

Small Breeds, Medium Breeds, Large Breeds

Key Features:

Low-Protein, Pea-Free, Veterinary Diet

First Five Ingredients: Corn, Brewers Rice, Chicken Fat, Chicken By-Product Meal, Natural Flavors

Guaranteed Analysis: 10.5% Protein, 16% Fat, 4% Fiber, 10% Moisture

Estimated Carbohydrates: 59.5%

Caloric Content: 3,879 kcal/kg, 365 kcal/cup

Pros

  • Specifically formulated to support kidney health
  • Helps manage decreased appetites
  • Aids kidney function by increased antioxidants, fatty acids, and protein levels
  • Excludes peas
  • Can mix and match all Royal Canin varieties to suit appetites

Cons

  • Includes grains and corn
  • Made dogs initially gassy when they switched to this dog food

This pea-free formula by Royal Canin provides added nutritional support for older dogs with concentrated sources of vitamins and minerals. The unique taste of this dog food stimulates poor appetites, a frequent characteristic suffered by senior pups.

Weak kidneys will be prevented from overworking because of the lower 10.5% protein content, which originates from chicken by-product meals. Chicken is a natural source of glucosamine, an amino acid that prevents arthritic conditions by cushioning joints.

Added brewers rice and corn contribute to the protein content of the recipe. These ingredients are less strenuous on older tummies. Dried beet pulp and the previously mentioned ingredients ensure an appropriate 4% fiber that aids digestive systems. [6]

You can mix the several varieties of renal support diets that Royal Canin offers, which is why this recipe is a popular choice for dog owners with picky eaters. 

Chicken fat and brown rice largely contribute to the 365 kcal/cup and act as natural dietary fibers that help older dogs’ stomachs.

Numerous reviews from dog owners found this formula to be particularly effective in managing their older pup’s weight without causing excessive stress on their kidneys. Some owners found the diet to be somewhat greasy. 

Royal Canin Veterinary Diet Urinary SO Small Breed Dry Dog Food

Phosphorus Content:

1.0% max

Suitable For Breed Sizes:

Small Breeds, Extra Small & Toy Breeds

Key Features:

Pea-Free, Veterinary Diet

First Five Ingredients: Brewers Rice, Corn, Chicken Fat, Chicken By-Product Meal, Corn Gluten Meal

Guaranteed Analysis: 18% Protein, 15% Fat, 3.6% Fiber, 10% Moisture

Estimated Carbohydrates: 53.4%

Caloric Content: 3,727 kcal/kg, 358 kcal/cup

Pros

  • Specifically formulated for dogs under 22 lb and have urinary health concerns
  • Targeted nutrition that prevent kidney stones and urine concerntration
  • Stops urinary crystals forming through RSS methodology
  • Smaller kibble size for small mouths
  • Ideal protein content to manage kidney disease
  • Uses brewers rice to supply enough glycogen to smaller dogs

Cons

  • Includes corn, wheat, soy
  • Slightly higher 1% maximum phosphorus content

Smaller dog breeds need higher energy supplies compared to their larger counterparts. Many low phosphorus recipes won’t be able to supply them with that. But, fortunately, this recipe from Royal Canin provides the right amount of energy for your small pup while restricting excess stress on their kidneys.

This recipe uses a low relative super saturation (RSS) methodology, which reduces urine concentration and prevents kidney stones from forming.

Chicken by-product meals are the primary source of the 18% protein content. While it isn’t the first ingredient to feature in the list, it is a highly concentrated source of protein.

Small dog breeds are prone to developing hypoglycemia if they do not receive the recommended amount of glycogen. This is because their smaller body mass cannot store large amounts. [7]

Fortunately, this recipe uses brewers rice and corn as easily digestible carbohydrates to ensure your small dog’s getting enough glycogen.

This formula does feature a higher 1% phosphorus content compared to other veterinary diets on our list. But many pet owners comment on the smaller kibble size and how it encourages more chewing to prevent tartar.

Hill’s Prescription Diet k/d Kidney Care with Chicken Dry Dog Food

Phosphorus Content:

0.15% min – 0.5% max

Suitable For Breed Sizes:

Small Breeds, Medium Breeds, Large Breeds

Key Features:

Pea-Free, Veterinary Diet

First Five Ingredients: Brown Rice, Brewers Rice, Pork Fat, Cracked Pearled Barley, Chicken

Guaranteed Analysis: 12% Protein, 18% Fat, 5% Fiber, 10% Moisture

Estimated Carbohydrates: 55%

Caloric Content: 402 kcal/cup

Pros

  • Controlled phosphorus and sodium levels
  • Protect essential kidney function and supports muscles
  • Uses Enhanced Appetite Trigger (E.A.T) technology to help appetites
  • Clinically proven to improve quality of life

Cons

  • Includes corn, wheat, soy
  • Slightly high 402 kcal/cup caloric content may be unsuitable for obese dogs

Like their smaller cousins, larger dog breeds require specific nutrients and vitamins for their bodies to function correctly. This veterinary prescribed dog food proteins kidney and heart function and helps sustain muscle mass.

The moderate 12% protein content comes from whole chicken. This lean meat is an excellent source of glucosamine which helps a larger dog’s overworked joints from developing joint-related conditions. Brown rice, however, is the first ingredient in the list and also bolsters the protein content of the recipe.

Dried beet pulp contributes to the 5% fiber in the formula, a rich source of prebiotics that aid digestion by nourishing beneficial bacteria in a dog’s digestive system. 

Large breeds typically suffer from conditions like bloat, a buildup of gas. The inclusion of dietary fibers helps prevent this condition. [8]

Added fish oil helps give your dog natural sources of omega-3 fatty acids that fight inflammation commonly linked to joint-related conditions in large breeds.

The formula also uses an Enhanced Appetite Trigger (E.A.T) technology that helps appeal to picky eaters by enhancing taste and food intake. Hill’s prescription formula is proven to prolong and increase your dog’s quality of life.

Hill’s Prescription Diet c/d Multicare + Metabolic, Urinary + Weight Care Dry Dog Food

Phosphorus Content:

0.45% max

Suitable For Breed Sizes:

Small Breeds, Medium Breeds, Large Breeds

Key Features:

Veterinary Diet

First Five Ingredients: Brewers Rice, Corn Gluten Meal, Powdered Cellulose, Pea Fiber, Chicken Meal

Guaranteed Analysis: 21% Protein, 8.5% Fat, 16% Fiber, 10% Moisture

Estimated Carbohydrates: 44.5%

Caloric Content: 279 kcal/cup

Pros

  • Formulated by nutritionists, veterinarians and researchers
  • Support immune system
  • Unique blend of dietary fibers that aid digestion
  • Manages weight and risk of oxalate stones
  • Ideal fiber and caloric content for weight control recipe

Cons

  • Includes common allergens like grains, corn, and wheat

This prescription diet by Hills is clinically proven to help manage a wide variety of conditions and manage your canine’s weight and urinary health.

Compared to other veterinary diets, this low phosphorus dog food has a higher 21% protein content, which comes from the use of chicken meal. This white animal meat is a great ingredient to use because of its minimal fat content. 

The use of chicken, a lean protein ingredient, helps provide a steady energy source for dogs on a weight control diet. [9]

Likewise, the low 279 kcal/cup caloric content and 8.5% fat is ideal for managing your pup’s weight.

Whole fruits and vegetables contribute beneficial dietary fibers and contribute to the recipe’s overall 16% fiber content. These vegetables and fruits also help counteract the digestion of protein and prevent oxidative damage to cartilage tissue.

Numerous reviews share weight loss success stories. Some picky eaters struggled to switch to this low phosphorus dog food initially.

Natural Balance L.I.D. Limited Ingredient Grain-Free Salmon Formula Dog Food

Phosphorus Content:

0.6% min

Suitable For Breed Sizes:

Small Breeds, Medium Breeds, Large Breeds

Key Features:

Limited Ingredient Diet, Sensitive Digestion, No Corn No Wheat No Soy, Grain-Free, Pea-Free, Chicken-Free

First Five Ingredients: Salmon, Menhaden Fish Meal, Sweet Potatoes, Cassava Flour, Potatoes

Guaranteed Analysis: 24% Protein, 10% Fat, 4% Fiber, 10% Moisture

Estimated Carbohydrates: 52%

Caloric Content: 3450 kcal/kg, 373 kcal/cup

Pros

  • Low 0.6% phosphorus content
  • Limited ingredients prevents allergies
  • Crafted by nutritionists, researchers, and veterinarians
  • Increased taste that appeals to some picky eaters

Cons

  • Slightly higher 24% protein may be unsuitable for some kidney disease
  • 373 kcal/cup caloric content isn’t suitable for obese dogs
  • Some dogs didn’t like the smell of the formula

This grain-free dog food is formulated by animal nutritionists, scientists, and veterinarians to ensure that all the content does not trigger adverse reactions and stress on the kidneys.

Salmon and menhaden fish meal are the primary sources of the 24% protein content in this low phosphorus dog food. Likewise, the low 10% fat and average 373 kcal/cup caloric content make this limited ingredient formula suitable for most dogs.

However, the inclusion of salmon also adds to the diet’s 0.4% minimum omega-3 fatty acid content. These fatty acids help manage dry skin conditions commonly associated with food allergies. 

The 0.6% minimum phosphorus content prevents overworking kidneys and causing adverse kidney-related conditions.

Sweet potatoes and white potatoes act as steady sources of carbohydrates but also provide added prebiotics that aid digestion and prevent tummy upset. [10,11]

Some picky eaters didn’t like the recipes’ unique taste and smell. However, many dog owners noticed improvements in their sensitive dog’s skin and allergies when they switched to this low phosphorus diet.

Hill’s Prescription k/d Kidney Care + Mobility Care Chicken Dog Food

Phosphorus Content:

0.29% min

Suitable For Breed Sizes:

Small Breeds, Medium Breeds, Large Breeds

Key Features:

Pea-Free, Veterinary Diet

First Five Ingredients: Brewers Rice, Flaxseed, Pork Fat, Egg Product, Dried Beet Pulp

Guaranteed Analysis: 15.3% Protein, 23.6% Fat, 3.9% Fiber, 10% Moisture

Estimated Carbohydrates: 47.2%

Caloric Content: 4068 kcal/kg 496 kcal/cup

Pros

  • Low 0.29% minimum phosphorus content
  • Controlled 0.19% sodium to protect heart and kidney function
  • Uses rich amino acid ingredients to build muscle and protect joints
  • Specifically formulated to protect joints and common conditions suffered by elderly dogs

Cons

  • Intense smell of formula is off-putting for some dogs
  • Not appealing for picky eaters

Chronic kidney disease, reduced cognitive function, and mobility are common conditions suffered by older pups. As your dog’s joints get older, they will become prone to discomfort.

This formula is specifically designed to provide nutritional support for managing these conditions and improve a dog’s quality of life. Likewise, this prescription dog food controls the amount of phosphorus and sodium to manage kidney health. 

The 15.3% protein is a safe amount to manage kidney conditions. The inclusion of egg products bolsters the number of amino acids needed to support muscle mass and increase mobility.

Glucosamine and chondroitin are added to support joints by creating healthy cartilage tissue around joints. These amino acids play a vital role in improving mobility and easing joint discomfort. [12]

Antioxidants and vitamins supplements are put into this low phosphorus dog food to prevent oxidative damage to cartilage tissue. Added flaxseed contributes to the 23.6% fat content; this ingredient is a rich source of DHA and EPA, preventing inflammation.

Many dog owners noticed improvements in their pup’s joints and mobility when they went on this diet. However, the intense aroma can be off-putting for picky eaters.

Hill’s Prescription Diet c/d Multicare Urinary Care Dog Food

Phosphorus Content:

0.41% min – 0.7% max

Suitable For Breed Sizes:

Small Breeds, Medium Breeds, Large Breeds

Key Features:

Pea-Free, Veterinary Diet

First Five Ingredients: Whole Grain Corn, Chicken Meal, Pork Fat, Corn Gluten Meal, Soybean Mill Run

Guaranteed Analysis: 18% Protein, 13% Fat, 5% Fiber, 10% Moisture

Estimated Carbohydrates: 54%

Caloric Content: 375 kcal/cup

Pros

  • Developed by nutritionists and veterinarians
  • Prevents struvite and calcium oxalate stones
  • Controlled levels of calcium, phosphorus, and magnesium
  • Balanced nutritional fats and sodium to help maintain weight

Cons

  • Includes grains, corn, soy, and wheat

Kidney disease and urinary health conditions are commonly linked together. And excessive quantities of phosphorus can severely damage the kidneys and overwork them. 

This veterinary prescribed diet uses specifically formulated nutrition to reduce the risk of oxalate stones and struvite by controlling phosphorus, calcium, and magnesium. [13]

The suitable 18% protein comes from the inclusion of chicken meal. And while the 13% fat content primarily originates from this lean meat, it also comes from pork fat. 

Pork fat contributes essential omega-3 fatty acids that help manage bladder conditions because of its anti-inflammatory properties. 

It is worth noting that this formula does not increase the production of urine. Many dog owners noticed improvements in the frequency of urine and appreciated the reduction in accidents. Over 98% of dog owners recommend this product because of how carefully formulated it is.


Low Phosphorus Dog Food Buyers Guide

Phosphorus is a crucial part of any dog’s diet. But excessive quantities can lead to complications for dogs with severe kidney disease.

Read more to find out how to select a safe, low phosphorus diet for your dog, what to look for when buying one, and why your dog may need it.

What Is Phosphorus and Why Is It Important?

Most dog foods will contain phosphorus. This macromineral plays a critical role in bone development, as well as motor functions and energy storage.

You may also notice that many puppy dog foods will contain higher phosphorus concentrations to help their growing bones. [14]

As adult dogs age, their dependency on phosphorus decreases; however, consuming too little can lead to severe health conditions. 

Does My Dog Need A Low Phosphorus Diet?

In normal circumstances, no. But if your dog suffers from kidney disease, they may need to lower their phosphorus intake so that it doesn’t put excess stress on them.

Chronic Kidney Disease (CKD) occurs when your dog’s kidneys are damaged and cannot filter the blood as they usually would. As a result, this leads to mineral wastage accumulating in the body, such as kidney stones, and eventually leads to renal failure. 

Research suggests that phosphorus is directly linked to weakening the kidneys in excessive doses. Lower phosphorus diets can effectively manage conditions such as chronic kidney disease. [15]

Things To Look For When Buying Low Phosphorus Dog Food

Unfortunately, there aren’t many dog foods that offer nutritional support and the appropriate amount of phosphorus for kidney conditions.

When looking for low phosphorus dog food, be sure to consider the following factors.

Calcium

Some kidney management dog foods will use calcium as a phosphorus binding agent to prevent your dog’s metabolic system from processing the mineral. 

These binding agents will stick to the phosphorus before being processed. As a result, additional phosphorus passes through the digestive tract.

This mineral plays a crucial part in bone development and is frequently used as a phosphorus binder. Larger quantities of calcium help prevent the phosphorus from reaching the dog’s kidneys. [16]

Nitrogen Traps

Nitrogen traps work by reducing protein wastage and excessive strain on the kidneys.

When protein is ingested, it creates by-products that often pass through the kidney and leave the body through urine. Nitrogen traps redirect this wastage to the colon instead. 

When purchasing a low phosphorus dog food, look for ingredients rich in prebiotics. Below are some commonly found prebiotic fibers in dog food.

  • Chicory root
  • Barley
  • Oats
  • Apples
  • Flaxseed
  • Wheat bran
  • Sweet potatoes
  • Pumpkin

A recipe with high fiber content will ensure that your dog is getting additional digestive support. 

Phosphorus 

Most dog foods will meet the minimum nutrient requirements of 2% phosphorus content. However, some dogs may need to have reduced intake for their kidneys to function appropriately.

Most low phosphorus dog foods will have less than 1%. However, dogs that suffer from chronic kidney disease will need to have approximately 0.2%-0.5% phosphorus content in their diet. [17]

High-Quality Protein Ingredients

Large consumption of protein can have severe detrimental effects on stressed kidneys. However, most meat-based protein ingredients like chicken, duck, lamb, or pork will contain amino acids needed to support muscle health.

As you may have seen in our list, some formulas don’t have meat as the first ingredient. If this is the case, ensure the dog food contains a high-quality protein source like chicken. 

Sometimes, your vet will recommend switching to low-protein dog food so you can effectively manage their kidney condition. Most of these types of dog foods are prescribed.

Final Thoughts

Low phosphorus dog foods play a vital role in managing kidney conditions such as chronic kidney disease.

Excessive quantities of phosphorus can overwork weakened kidneys and result in severe complications if left untreated.

Overall, I found Blue Buffalo Natural Veterinary Diet KS Kidney Support Dog Food to be the best possible choice because of its high-quality protein ingredients and appropriate phosphorus content.

Most kidney management dog foods need a veterinary prescription because of their targeted nutrition and content. Speak to your veterinarian to determine whether a low phosphorus diet is the best possible solution for your loveable pup.

James Fuller

James Fuller

Founder of Honest Whiskers

Hey! I’ve owned a pet pretty much all my life, in fact, I currently have both a cat and a dog! My mission is to deliver a reliable, trusted website that only uses evidence-based information

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