Answer:
The fans of the pied piper's smooth sound who are feared by elephants
A pony trots his way through the world on these.
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.
What has armor but is not a knight, snaps but is not a twig, and is always at home even on the move?
Who is it that rows quickly with four oars but never comes out under his own roof?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.