Well now... seems you got some inaccurate information... First off.. Welcome !
Okay. Let's tackle the multi dragons in one enclosure... yes it might be possible for more than one dragon to an enclosure, but figure a space of 6' squared for each animal, and that Miiiiight work. Usually though, aggression, over breeding happens... it also makes parasite infestions easier to happen over and over again.
So, one dragon to an enclosure is the best, healthiest way to keep these animals.
On to the diet. Adults will actually consume around 80% greens in their diets, and around 20% proteins.
Here is a handy list of foods you can use to offer your babies the very best.
http://www.beautifuldragons.503xtreme.com/Nutrition.htmlGreen is for staples daily, Black is for treats... Pretty much just ignore the rest, since they are questionable at best. You still get plenty of variety with the green and black.
Since you have that second enclosure ready, go ahead and separate them today. They will be better for the move...
Janie