What’s scary about cow’s milk? Nothing … if you are a calf. But, if you are a human, it’s a very different story. If the lactose intolerance, allergic reactions, and threats of salmonella and E. coli poisoning don’t scare you, perhaps this will: The human race is the only species to ingest the milk of another species and to drink it past infancy! Imagine breast-feeding another mammal … ugh! Now, that’s scary!