Answer:
I always follow my brother but you cannot see me, only him. You cannot hear him but you can hear me. What are we?
Kills the bad ones and the sad ones. Tightens to fit, so one size fits.
who do you think you know but sometimes you don't
How far will a blind dog walk into a forest?
What is it that you must give before you can keep it.
I break away from my pack. I create holes in my victims. I can travel for miles and then disappear. I am part of a dying breed. What am I?