How much salt should a dog have in its diet?
No need to add salt to your dog's food. Pet foods are manufactured with sufficient balance of protein and minerals to keep your dog healthy. Bones and raw meat also naturally contain sufficient salt for animals. Don't give bones too often, just as a weekly treat. Don't include additives of your own to your pet's diet.
All mamals crave salt to a point. Humans not so much anymore because there is so much salt in the foods they eat. Back in history the hunters often staked out the natural occurring salt licks to insure finding an animal to get for their next meals. Make sure your dog is getting a good quality dogfood and this should take care of any cravings.