I hope to cover the minimum supplements needed for a dry dog food diet, a fresh food or raw diet and a combined diet of fresh and dry dog food in this article. The word supplements covers a wide variety of nutrients. This could mean vitamins, minerals, herbs, probiotics, digestive enzymes, herbs or green foods, such as sea algae, kelp and sprouts. Many of these are sold as combinations, or individually, so often dog owners are overlapping in their supplements, without realizing it.