Is there any chance she is Gravid??? sometimes females will refuse to eat after they are gravid and if he is a breeder there maybe a chance you might want to ask him if there is even a slim chance she is. if not then balls can just be picky eaters, worst then kids what was once their fav. food they refuse it eat and sometimes it comes down to what you are feeding them I have a ball that refuses to eat all white rodents but even a lil color in them and he is all over it and I used to have a ball that refused to eat anything but hampsters not sure why but they are as inexpensive as mice so I didn't mind.. Good luck gotta love the free snakes I just scored a free female with a 40gal breeder tank and all the lights myself just a few days ago.