Answer:
No matter how little or how much you use me, you change me every month.
I have one door and five rooms what am i
Alive without breath, As cold as death, Clad in mail never clinking, Never thirsty, ever drinking
A muttered rumble was heard from the pen, and I, in my walking stopped to look in. What was this I saw? A massive beast, hoofed, and jawed. With spikes upon its mighty brow, I watched as he struck the turf and prowled. And yet for all of his magnificence, he couldn't get out of that wooden fence.
People are hired to get rid of me. I'm often hiding under your bed. In time I'll always return you see. Bite me and you're surely dead.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.