Answer:
My keepers feed me colored balls. With sticks they store on my den walls. Sometimes I store them in my pouch. Sometimes deep in my belly; ouch!
I can be in your body but never on your placemat. I'm always better when I'm fresh, but you'll never see me in the flesh. What am I?
I am always running but I never get tired or hot. What am I?
What goes through towns and over hills but never moves?
I am useless when together but useful when I am broken apart. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.