Answer:
I am what one cannot keep, two cannot hold, and three cannot destroy. What am I?
My teeth help me suck.
I have thirteen hearts but no body or soul. What am I?
I am so delicate that even mentioning me breaks me. What am I?
What runs but never walks has a mouth but never talks has a head but never weeps has a bed but never sleeps?
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?