You Don't Know What You Have Until It's Gone

As you know, dear reader, the two dwarves Kili and Fili hold each other and their brotherly bond most dear to their hearts, more than any gem or coin. But that was not always the case. This is the story of how these two dwarflings came to love each other so much, for you don't really know what you have until it's gone. NO SLASH! Will be a 2 - 5 shot. Or maybe more, I don't know.