As if you didn’t have enough to worry about, here’s some disturbing news: According to a report in the June issue of Journal of Alzheimer’s Disease, farm-raised fish could be carriers of bovine spongiform encephalopathy, otherwise known as mad cow disease. That’s because some farmed fish are fed cow scraps. (I know: yuck.) It hasn’t actually been shown that fish can transmit the disease to humans. Still, the researchers who wrote the paper are calling on the government to ban feeding cow meat or bone meal to fish until the practice is found to be safe. So if you’re feeling smug because you always order the salmon instead of the burger, think again.