Man you people are so rude. Anyway you should only feed the snake something the same or slightly larger then its girth. Also if it is live do not leave it in the tank as it can harm your snakes. Watch it for about 20 minutes and if it does not want it take it out and try again later. You can use forceps to dangle the mouse and the snake interested.

For the handling, the ball will not bite you. They are one of the most reluctant to bite. If it is uncomfortable and scared it curls into a ball but after a couple minutes in you hand it should relax and roam more. The more often you handle, the more used to you they get. Also try to handle less during shedding since there sight is impaired. I know its scary but you will be fine even when your ball hisses they most likely will not bite. Have fun with your ball!!.

P.S when you are going to pick it up rub it first to let it know your there.