This thread is ridiculous. Multiple Ball Pythons should not be hosed together. There are lots of reasons. The biggest issue I see here is breeding. You have a small female that could get bred and suffer because of it. Your bigger female might be ok being bred but, are you ready for eggs? The issues with housing multiple ball pythons together has been beat TO DEATH. Arguments to the contrary fall into two categories. Those who look at the snakes with there mammalian brains and say "oh they look happy" and those that those that are just plain big headed ignorant. If you want to keep your snakes together feel free. If you have any issues with your snakes this forum and anyone in the know will start with "Seperate the snakes".

One last thing. If you want scientific proof then start thinking like a scientist.

Understand that your situation is not the rule, understand that you are wrong until you prove you are right. Sure the accepted wisdom could be wrong, I will not deny the possibility. The burden of proof is on you though. Until you show otherwise, multiple ball pythons should not be housed together. One last time, 4 balls in a tank is not proof that the accepted wisdom is wrong.