Answer:
He is not the skinniest of felines.
From that which comes within itself, It builds its table on my shelf.
When they are caught, they are thrown away. When they escape, you itch all day.
I am a big cat that runs very fast. I have spots all over my body. What am I?
It has plenty of backbone but doesn't have a let. It peels like an orange but it comes from an egg.
You use it between your head and your toes, the more it works the thinner it grows.