Im so sorry for you. Indeed beardies are solitary creatures and they should never be housed together. Some people have had them housed together for years and one day came home to injured or dead dragons. There can be signs of dominance early on, but either we misread them as something else, or you have to be dragon to understand!!
If your adults are alos housed together i would separate them also, just to be safe! Love to the little one and i hop eit all clears up for you!
Buggsy