Pillows.

Feathers are what you use to fly
Now plucked from the wing of birds in the sky
Put in a place where they're not at home
Used to lay on, soft as foam.

Imagine a night laying on rock
Now imagine a bird that can only walk
You take away from one, and give to another
Feather is to bird, as sister to brother.

If you lose a sibling, the pain eats away
If you lose a feather, you won't last all day.
In the end, the bird will die.
Unable to escape up into the sky
But look at the bright side, you got some sleep.
You stole it's feathers, you're not going to weep.
So enjoy your dreams, they come every night
But for that bird in the sky, you've taken it's flight.