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Salt, or sodium chloride as it is often listed, is commonly added to pet foods as a flavour enhancer.
While salt is a necessary mineral, it is generally present in sufficient quantities in the raw ingredients of pet foods. However, since dogs, like humans, enjoy the taste of salt, extra is regularly added to dog foods to make them more appealing. Unfortunately, excessive salt has the same health implications for dogs as for us and should be avoided. This is particularly important if your dog has a history of heart problems or high blood pressure.