We’ve always known that dogs possess a super sense of smell, and that they are very protective of their owners.
Now here’s an interesting twist: researchers at Imperial College (my husband’s alma mater, by the way) have determined that dogs can sense cancer by smelling the proteins thrown by a patient with cancer. They first were let on to this by stories of dogs who started acting very strangely towards spots on their owners legs, which turned out to be cancer.
You can read more about this here.