Oh, but another thing that's going on with most communal housing arrangements that doesn't get a lot of attention? Is glass. Most tubs/racks have semi-opaque containers, while most multiple-animal situations are in large tanks. Even without another animal present, the glass seems to give ball pythons vertigo. Especially young ones: you wanna see a hatchling bp have a complete nervous breakdown, move it from a small tub into a 60 gallon tank with too little furniture. FREAK. OUT.