Answer:
I produce wool and spit a lot
I have three feet but no arms or legs
The more you add the less it weighs. What is it?
Tear me off and scratch my head, what once was red is black instead. What am I?
I go up, let out a load and then go back down. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.