Answer:
I am an activity dogs are very good at when a ball is thrown.
I am always around you but often forgotten. I am pure and clean most of the time, but occasionally rotten. What am I?
I see what you see feel what you feel and hear what you hear. I know all of your moves before you make them. I even know the moves you didn't make.
I travel in a gaggle.
I am black of eye and bright of hair. I fast into the ground and follow my lord as he races around the world. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.