Hi there..yep..Janny there is right..you just let them sort themselves out..but what you can do until then, is to provide the hiding one some alternative feeding inside..otherwise she will grow up very slowly and be the 'under dog' forever.. ::)
Even if it just small bowl of water raised on few bricks and bit of food it will help..at least she has better chance to get some nourishment down..she will learn to sneak behind others back.. ;) ;D
Have fun...