more than one

What are the rules on housing multiple dragons together? Given same approx age/size? Is it better to have a male and female? Two males? Two females? Better to not have multiples at all?

That's an easy one,It's best to have no multiples at all

I only slightly disagree with the above poster,let me explain:It is fine to have more than 1 dragon,but you HAVE to keep them seperated. Each beardie would need it's own tank to live in,NO putting them together,again I will explain. Bearded dragons are VERY territorial and will fight until one or both are injured or dead.
That being said,there are some people who house their dragons together with success,but they are the exception,not the norm.We have several members here who have lovingly raised dragons that have missing toes,part of their tails missing etc from clutch mates or where someone else kept them caged together. There have been all kinds of stories about dragons fighting and killing or seriously injuring each other,why take the risk?In the wild,beardies come together to mate and then go their seperate ways.

:roll: you know what I meant