Answer:
What starts with an "e" but only has a single letter in it?
What gets bigger the more you take away from it?
Soldiers fight it but never changes.
What you become during a workout?
What is born on the ground but floats to the sky, to be returned back again from the clouds up high?
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.