Salt is contained, may it not be good for the dog?

The salt is essential to maintain life for an animal. Because dogs do not sweat, it may be said that an intake of the salt is hardly necessary, but most of the salt are exhausted not sweat by urine.

In the standard of AAFCO, (The Association of American Feed Control Officials) it is said that sodium is needed at least 0.3%(the puppy stage) and 0.06%(the adult dog stage). We add a minimum to maintain the health of all stages.