Answer:
I start new then become old. Start clean but become dirty. I usually start big then become little. What am I?
What gets bigger when more is taken away?
I open to close but I close to open. I'm surrounded by water but I'm never soaking. What am I?
I have a strong affection for belly buttons.
You cannot keep me until you have given me. What am I?
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?