Hi,
s long as they are all adults and the same size you should be fine after a quarantine period of 30 to 60 days
Yes, I didn't deny that!! But adult, not subadult! As long as they are not any more in growth!! That's the point!
To be all the time pregniant (as a result of keeping male and female together) and being in growth can cause mbd because of the stress and energie the female needs for both (growth & egg production) ... That's what is usually said ... And what for me makes great sense!!!! Doesn't matter what other are saying ..., I've heard enough of females with rachitis because butting them too early together ...
Finally it's a question of opinion, you have to decide ...; It's your responsibility ...
But Brains post were making me unsecure about the sex too ...

?!
I took a clear look once again, and I must say, although it's very dark there where one should guess the sex, but it could be a female ...
Try to make a pic more of the bulge ... :? ?!?
But, BTW: I forgot to say that he or she is really fantastic looking cresty, I like the big spots next to the partial pinestripe ..., really a beauty!
Greets
Peter