Blood warning and toph spoilers ahead. Ok good. I was vague enough that you all have some idea of what happened yet no idea at all. Good. Good. Here's a clarification. Boulderpatch and Cinderglow do not have any connection in the PMV. Cinderglow is not angry at Boulder and Boulder is not angry at Cinder. It also has nothing to do with Boulderpatch wanting to mentor Dovepaw. There is no way he'd even want to mentor her. And even if he did, he wouldn't be able to. Dovekit/paw is the focus.
So I think, ( I saw this in other theories ) The brown tail or claw was mudstar. He maybe exiled her. I saw this in one theory. ( MY THEORY ----> )And Boulderbutt went after her. He wants to say sorry. Then dovebby fell. She knocked a boulder down. It fell on boudlderbutt. Now I think they were new to shadow clan so they named him boulderpaw after the accident. He was named Jack before but needed a new name. SO therfore we got boulderpatch.
