Answer:
My first master has four legs, my second master has two. My first I serve in life, my second I serve in death. Tough I am, yet soft beside. Against ladies cheeks I often reside.
If a man carried my burden, he would break his back. I am not rich, but leave silver in my track.
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
Where do you go in through one hole and come out through two holes at the same time?
In your fire you hear me scream, creaking and whining, yet I am dead before you lay me in your hearth.
What is lighter than what it is made of?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?