We have a male syrian and two female syrians in the same room without a problem
![](https://www.hamstercentral.com/community/images/smilies/icon_smile.gif)
We also have male and female chinese and hybrids in the same room, and used to have male and female robos in here too (now we only have a male). The only time we've ever had a problem was when we had a male robo living directly above a female, then it bothered the male so we swapped the cage locations and they were both fine again