Answer:
What grows up while growing down?
While I did live, I food did give, which many one did daily eat. Now being dead, you see they tread me under feet about the street.
I'm known for being stubborn and saying 'hee-haw.' What am I?
What follows a dog wherever it goes?
They're actually great swimmers now, but later they will become excellent hoppers.
You use it between your head and your toes, the more it works the thinner it grows.