Answer:
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
When the horse strokes the cat, the wood begins to sing.
As I walked along the path I saw something with four fingers and one thumb, but it was not flesh, fish, bone or fowl.
Neither bought nor sold but more valuable than gold. It is built but not by hand. What is it?
People take me on walks and I run and have fun. What am I?