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June 29, 2021

Which Low Sodium Cat Food Should I Buy?

Cats’ bodies are powerhouses. Their hearts pump at a rate of 170 beats per minute. They can jump, prowl, smash, bite, and claw. They’re some of the fastest animals, most skillful climbers, and apex predators around our households – but their kidneys are fragile. They say that a cat’s kidney is as thin as a piece of paper.

Unlike us, cats can’t afford to salt their meals and rely on their large kidneys to evacuate excess salt. Sodium is, of course, necessary in a cat’s daily diet, but to a different degree and in different proportions. The recommended daily doses of sodium per pound are much smaller than those for humans, for example.

Cats suffering from kidney malfunction have to take in even less sodium to protect their kidneys. Some health conditions also require a low sodium diet. Here, we bring you a complete review and guide for the best low sodium cat food you can order online.

Healthy Low Sodium Nutrition

To create a balanced and affordable diet, we first have to recommend mixing wet and dry food in your cat’s daily diet, especially if its condition is related to gastrointestinal problems. Always provide enough fresh water along with the meals.

Last update on 2021-10-21 PST - Details

1. Hill’s Prescription Diet: Kidney Care Wet Cat Food

Hill’s is still the paragon among veterinary diet producers. The expertise behind each and every veterinary line has been proven in effectiveness over the past few decades. Some still see improvements over the years, and others are already perfect as they are.

This is why we recommend the Hill’s Kidney Care Formula for all who need a low-sodium solution. The can is filled with all the necessary nutrients a cat needs. The taste is also appealing and most cats have no problems eating it.


  • Protein: 30%
  • Fat: 23%
  • Carbohydrate: 38.7%
  • Sodium: 0.24%
  • Taurine: 0.45%
  • Calories: 177 Kcal/ 5.5 oz
  • Wet food, high palatability
  • Supports kidney function
  • A balanced diet, all the cat needs
  • Veterinary approval required
  • Expensive if only fed with k/d

Last update on 2021-10-21 PST - Details

2. Blue Kidney + Mobility Support for Cats

Gluten-free and high in animal products, Blue K/M.S. for cats provides everything dry food should for a cat to stay healthy and mobile. It’s enriched with glucosamine and chondroitin that soothe joints and reduce pain when moving.

A low protein and low sodium diet protect the kidneys by lifting the load off of them. The ingredients included are deboned chicken, peas and pea protein, and dried eggs. They provide the best, natural, and highly absorbable protein for healthy body functioning.

The food is packed with additional minerals and a vitamin mix to improve cats’ health and natural ingredients that contribute to specific compounds that improve digestion, nutrient absorption, blood cell count, and the immune system.


  • Protein: 26%
  • Fat: 18%
  • Carbohydrate: not noted
  • Sodium: 0.35%
  • Taurine: 0.20%
  • Calories: 425 Kcals/cup
  • Grain-free
  • Low protein
  • Easily digestible
  • Palatability
  • Veterinary approval required
  • Not suitable for kittens

Blue Buffalo Natural Veterinary Diet K+M Kidney + Mobility Support Dry Cat Food, Chicken 7-lb bag
Blue Buffalo Natural Veterinary Diet K+M Kidney + Mobility Support Dry Cat Food, Chicken 7-lb bag
Controlled levels of protein to help manage kidney workload.; Controlled levels of phosphorus and sodium to help support kidney health.

Last update on 2021-10-21 PST - Details

3. Hill’s Science Diet Adult Indoor Cat Food Chicken

The final low sodium cat food on our list, the Hill’s Diet Indoor Formula is packed with good proteins with high absorbability and the formula is adapted to suit the needs of a regular house cat. The sodium level is low and is recommended as a precautionary measure.

Prevention is the best cure.

The food is packed with natural fibers that promote healthy microbes in cats’ intestines and support digestion. The kibble is small and soft so cats like to munch on it, reducing the chance of swallowing the kibble whole, which can lead to gastric irritations.

A balance of proteins, fats, and carbohydrates ensures a healthy energy boost throughout the day allowing a cat to feel satisfied until the next meal.


  • Protein: 36.1%
  • Fat: 16.1%
  • Carbohydrate: 31.7%
  • Sodium: 0.55%
  • Taurine: 0.23%
  • Calories: 319 Kcal/cup
  • Great results in cat’s overall health
  • Good palatability
  • Sodium content too high for cats with kidney issues

Hill's Science Diet Adult Indoor Cat Food, Chicken Recipe Dry Cat Food, 15.5 Lb Bag
Hill's Science Diet Adult Indoor Cat Food, Chicken Recipe Dry Cat Food, 15.5 Lb Bag
Made with natural fibers to promote healthy digestion and easy litter box clean up; Uses quality protein and natural fibers to support your adult cat's hunger between meals
$47.99 −$4.00 $43.99

Last update on 2021-10-21 PST - Details

Buyer’s Guide

Sodium content is problematic due to the complexity of its effects on a cat’s health. Some companies, therefore, resort to hiding or making it difficult to find the sodium content in their products.

For example, they may introduce sodium through neutral compounds that change structure once they go through the digestion process rather than flat out seasoning the kibble with salt.

As most of us are not veterinarians or pet nutritionists, it’s hard to track sodium placement in the cat’s body. One thing is for sure, all that sodium has to go through the kidneys. Though sodium is vital for the healthy functioning of cells, cats have to be extra careful.

Below is our breakdown of the best cat foods with low sodium.

Best Wet Low Sodium Cat Food: Hill’s k/d

K/d has saved and improved many cats’ lives around the world. It‘s a vet’s go-to when treating poor kidney function, especially chronic kidney disease. So far there hasn’t come a commercial prescription product that managed to get better results.

Best Grain-Free/Senior Prescription Option: Blue Kidney + Mobility Support For Cats

Kidneys’ function gradually drops over time, and rarely is there a senior cat that can boast about healthy kidneys. Along with kidney failure come problems with bones as cats age. Blue Buffalo For Kidneys helps with low protein and sodium content as well as glucosamine and chondroitin to improve joint mobility.

Best Low Sodium Kidney Issue Prevention: Science Indoor Adult Chicken

This low sodium cat food is meant for healthy house cats and used to prevent any future kidney issues. To add to their list of health, digestion, and energy benefits, Science has created this product with enough sodium to keep the cells functioning properly.


Our list of the best low sodium cat food is just a start on your joint road to your pet’s wellbeing. We have to take extra care when it comes to cats’ kidneys. In the long run, it will pay off. To prevent kidney problems in your cat, we recommend the Science Indoor for Adult Cats. 

If your cat suffers from chronic kidney disease or poor kidney function, consult your veterinarian and check out Hill’s k/d and Blue Kidney + Mobility Care.

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