housing them together is kinda like housing two snakes together. you may be successful with it but it really isn't recommended. i have seen some breeders housing them together in a huge room with a bunch of basking areas... and it seems to work for them but i know it isn't looked kindly upon by avid beardie owners.

housing them sep. really is best.

http://www.beardeddragon.org/articles/armWaving/

To throw in my two cents about housing dragons together, I would say that it's risky. People have successfully managed to house bearded dragons together, yes, but there are also the stories of people coming home to one of their dragons having a painful bite, missing limbs, or even mauled to death by their cage mates.
from: http://www.beardeddragon.org/bjive/v...c.php?p=266982