Found in the blood and in the fluid that surrounds cells, sodium maintains the cellular environment and prevents cells from swelling or dehydrating. Sodium is also important for maintaining proper nerve and muscle cell function.
Meat, poultry, fish, and eggs are good sources of sodium.
Sodium also might be included in commercial pet foods in the form of table salt (sometimes listed on the ingredient panel as salt). Salt is an important palatant for animals, as well as for people.
The Association of American Feed Control Officials recommends that dry dog foods contain at least 0.3% sodium for both maintenance and to support normal growth and development. This is the minimum recommended levels.
While high sodium intake might cause increased thirst and water consumption, the extra sodium is excreted in the urine of dogs. Healthy dogs are able to consume diets with higher sodium levels than those found in most commercial pet foods without increased blood pressure or gain in body water.
Therefore, the sodium level in commercial pet foods is not a cause for concern in healthy animals.

A veterinarian might recommend decreasing a dog's sodium intake if the animal has some types of kidney, liver, or heart disease, in order to help decrease high blood pressure or the accumulation of excessive body fluid.
Although older dogs might be more likely to develop these diseases, healthy older dogs do not require a low- or reduced-sodium diet.
The sodium level in our dog foods is appropriate for a healthy dog. The sodium content in these foods is balanced in proper proportions with energy, other minerals, vitamins, fats, proteins, and carbohydrates.
When, Why, and How to Start Feeding Your Pup Grown-up Nutrition
As your puppy grows into an adult dog, he needs nutrition that keeps his body as strong as your love, and that means a high-quality, premium adult formula such as IAMS™ ProActive Health™ Adult MiniChunks
Why move your grown-up pup to a premium adult dog food? Because quality counts. It's crucial to continue his superb puppy nutrition into adulthood. Downgrading to a lower-quality brand at this stage of his life may upset his digestive system, and won't provide him with the same level of nutritional excellence he was raised on.
Think of a baby. When it's time to start giving him solid food, you wouldn't dream of feeding your child anything less than the best nutrition you can buy. The same is true for your maturing puppy. He needs the best age-appropriate food there is to help maintain his overall health.
Premium foods, such as IAMS, are specifically designed to provide your dog with a food that has:
What does it all add up to? A happy, healthy dog. With premium dog food, you can expect key indicators that contribute to providing your dog with a long, healthy life:
Founded on more than 60 years of research into canine nutrition, premium formulas from IAMS help maintain your dog's health and provide him with the nutrition he needs for a long life. Basic brands may not provide these benefits or match the level of expertise that goes into every bag of dog food from IAMS.
Your puppy's transition to adult food should begin when he approaches adult height. His breed type will also help determine when to switch. Small-breed dogs tend to mature physically much sooner than large-breed dogs. Follow these guidelines to help you decide when to switch formulas:
Large- and giant-breed dogs, those weighing more than 50 pounds when fully grown, might not be ready to switch to an adult food until they're 12 to 24 months old.
To avoid upsetting your dog's intestinal tract or causing diarrhea, make the change from a puppy formula to an adult diet over a period of four days by mixing the two foods in your dog's bowl.
How much food should you give your dog? Check the daily feeding recommendations established by the pet-food manufacturer and read the label. Dan Carey, DVM and Director of Technical Communications at IAMS, suggests using the recommendations, then weighing your dog each week. If he's gaining or losing weight and shouldn't be, slightly decrease or increase his daily intake, and weigh him again in another week.
If you have specific concerns about your dog's weight, talk to your veterinarian. He or she can assess your dog's needs and give you a feeding recommendation.