The meats lowest in sodium are beef, chicken, and fish, especially cod and catfish. Additionally, we can also include eggs and seafood. Therefore, you can use these ingredients, such as beef and chicken, to come up with your own low-sodium meals for your pup. Of course, the key to keeping their low content of sodium is to not add any extra salt, so that the meats can preserve their properties, and hence, help your dog with its diet.