Answer:
Only two backbones and thousands of ribs.
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?
Crooked as a rainbow, and slick as a plate, Ten thousand horses can't pull it straight.
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.
A cowboy rode into Friday. He stayed in town for three days and rode back on friday. How is that possible?
I am owned by Old McDonald.