What Does A Cat Dream Of?

What do old cats dream of when they are sleeping in the sun? I don't know... chasing mice or insects maybe? Catching the ever elusive hummingbird? When we used to live in Bloomington IN Dr Desert Flower put the cat out on the front porch to be a mouser, as a family of mice had moved in under our front porch concrete stoop. The cat did very well in getting one of the parents, and the rest of the mouse family moved out. Maybe she's reliving her glory days of mousing?

To me, watching a sleeping cat is very relaxing, and stress relieving. During some taxing / stressful work conference calls, it's nice to look over and see my familiar snoozing.