We've kept babies for 3-4 months as one herd in a screen cage, and had no problems among the siblings. They seem to be much more tolerant of each other if they're raised together from the beginning. We had no agression between the males, and when they were 4m old and greening up they were sent out to the gulag, I mean a very high quality herp shop. Beyond 4 months though, we've never had two males together. Helpful?