If you don't want to lose your companions, then you need to stop buying snakes that you can't quarantine. I've talked to far too many people who lost ENTIRE collections because of one sick snake that came in. It only took one story from a friend to realize how important strict quarantine procedures are. Snakes can be sick without showing symptoms for some time, which is why quarantine is necessary. As far as the thin bp in your picture, it is thin as far as bps go, but not unhealthily thin. Just try feeding more regularly if he'll take it to get him up to proper weight. I stopped buying snakes until I had a quarantine DIY rack made. You can make one cheap, I live in a two bedroom apartment also, there's really no excuse.