1. Raw Meat and Fish

While it seems perfectly natural to give your dog a hunk of raw meat, doing so can increase the risk of exposure to bacteria like E. coli and Salmonella. These bacteria can cause stomach issues such as diarrhea and vomiting.
If you decide to feed your dog a raw diet, do your research and consult with a vet to avoid the risks of bacteria.
Some fish, including salmon and trout, can have a parasite that causes “fish disease.” It’s killed by cooking the fish.