I've used 2 or 3 different types of aspen filings, coconut fibers, etc. The best I have used so far is newspaper. Save the B&W newspapers & shred em yourself. My ball actually ate/swallowed some of the coconut fibers. The vet made a small incision & then took about 40 minutes of cleaning the fibers out. The vet said newspapers were the best to use. Also, my ball (a Spider Ball Python) will not eat either thawed out mice or live mice. He would rather sleep with em than eat em. I feed him about 25 units of Hills dog/cat food about every week and half to 2 weeks. He tends to move from side to side, up & down. We think its because of the breeding it's hard for him to fixate on prey to eat by himself. Be careful of who & where you go to when you buy your Ball Python. Good Luck