Multiple females same tank.... why not?

[Domepiece]

I will sometimes keep multiple young ball pythons in the tubs but keep males and female separate. But they all get their own tubs when they hit the 300-400 gram mark and I have time to make more space. I havnt had any problems with doing this in aspects of aggression but there are always 1 or 2 that seem to grow way faster than the rest.