Fish can be fed to both kibble and raw fed dogs. These fish listed are some of the best sources of omega-3 fatty acids and are the cleanest to feed because: 1️⃣ These fish are small and less likely to have mercury contamination and other toxins compared to larger fish. 2️⃣ They aren’t large bottom feeders, meaning they don’t eat a lot of junk from the floor of the ocean. Examples of fish to avoid are flounder, eels, haddock, bass, grouper, snapper, and some catfish. Benefits