If the snake is wheezing or whistles when it breathes then there is something wrong. A ball that doesn't eat is not an abnormal ball either these snakes are know to not eat for long periods of time. Also if you decide to get the snake your going to want to allow it to acclimate. This means not handling it for a while after putting it into its new enclosure. And some will say you will want to handle the snake daily so it stays used to you and doesn't get scared.