Answer:
My tongue hangs out as I run over fields and streets all day. I get tied up every morning and untied at night.
Goes over all the hills and hollows. Bites hard, but never swallows.
What can be forever wound up but never annoyed?
I go around in circles, but always straight ahead. Never complain, no matter where I am led.
I'm not really more than holes tied to more holes. I'm strong as good steel, though not as stiff as a pole.
Both old people and owls are said to be possessing this trait