Answer:
You can tumble in it, roll in it, burn it, animal eat it. Used to cover floors, still used beyond stall doors. Freshens whatever it is placed on. Absorbs whatever is poured into it.
I can run but not walk. Wherever I go, thought follows close behind.
They made me a mouth, but didn't give me breath. Water gives me life, but the sun brings me death.
What can you put in a barrel to make it lighter?
Double my number, I'm less than a score. Half of my number is less than four. Add one to my double when bakers are near. Days of the week are still greater, I fear.
An open ended barrel, it is shaped like a hive. It is filled with the flesh, and the flesh is alive!