It doesn't have to be supernatural. We know, for example, that dogs can smell various diseases. Also, someone pointed out that as people age and become ill, the

It doesn't have to be supernatural. We know, for example, that dogs can smell various diseases. Also, someone pointed out that as people age and become ill, they tend to do less outside the house, and shy animals will start to come out and stay closer. "There are more things in heaven and earth, Horatio, Than are dreamt of in your philosophy." Blanket ridicule of such phenomena is just as irrational as are many superstitions.