Only one simple ingredient!! What is Anchovies and its benefits? Anchovies are one of the healthiest fishes you can add to the diet of your dog. Anchovies are naturally rich in omega-3 fatty acids, minerals and vitamins. In particular, their omega-3 fatty acids offer powerful and wide-ranging health benefits. Omega-3 can contribute to the brain development of puppies, reduce inflammation, help dogs with arthritis, improve heart health and much more.