Answer:
Microparasite expert at sucking the blood of mammals and birds
What peels like an onion but still remains whole?
People take me on walks and I run and have fun. What am I?
I am a animal i have sharp teeth i am the of the forest
I say hoot and I'm wise. I sleep during the day and hunt at night. What am I?
You use it between your head and your toes, the more it works the thinner it grows.