Answer:
John Lennon sang about being this toothy creature.
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?
I'm known for being stubborn and saying 'hee-haw.' What am I?
A spent round or a slimy critter.
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?