Answer:
What measures out time. Until in time all is smashed to it?
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.
What measures out time until in time all is smashed to it?
who do you think you know but sometimes you don't
You throw me out when you want to use me and you take me in when you don't want to use me. Who am I?
People take me on walks and I run and have fun. What am I?