Answer:
I am the heart that does not beat. If cut, I bleed without blood. I can fly, but have no wings. I can float, but have no fins. I can sing, but have no mouth.
Each morning I appear to lie at your feet, all day I follow no matter how fast you run. Yet I nearly perish in the midday sun.
You seek it out, when your hunger is ripe. It sits on four legs, and smokes a pipe.
A kind of weather that comes your way, but add a "D" and it will run away
It is weightless, you can see it. If you put it in a barrel it will make it lighter?
I have two eyes in the front and a lot of eyes on my tail