HI. I'm not sure if I know the proper procedure for changing from my present BH to another. Over the past week, I've sent several inquiries to several BH's asking about joining. I haven't received a reply, yea or nay. 

Could this be because I have to leave my present BH before being considered for another? Is it because I've inquired from Bh's that are allied to my BH, and the leaders don't want to upset that relationship?

My reasons for desiring a change are personal and professional(?). Game wise, I'd like to learn different operational/organizational theories, and tactical procedures. I'd like to learn the game from other perspectives.