Do you think animals know when you are sick. I think my cats do.  When my wife was sick recently, our cat Morgan sat on her lap all day long and she is not even a lap kitty.  I recently got a note from my brother-in-law about my nephew Lucas confirming my theory:

Lucas' cat is named "Patches." She sleeps with him each night. She has always slept with him since she was a kitten. Lucas was sick today. Patches knows that most days Lucas goes to school during the middle of the day, especially on the days when David goes to school. Today Lucas is sick. Lorilee (Todd's Sister) pointed out that wherever Lucas has gone today, moving slower-than-healthy around the house, Patches has followed, watching over him.