Mine are all babies. One looks older then the other but they were just a small differance when I got it now its 3x the size of the other one. I think it has something to do with feeding one rats longer then the other.Mine will cruise the tank when hunting. Two are in large plastic boxes and one is in a tank. My 2 older ones refused to eat yesterday and acted like a rattler and kept tagging me and thier food. They tend to shed together so I'm sure that's all it is as they can quite a handfull when shedding.