My bf is in for domestic violence and attempted sodomy...if other inmates find out, is he in danger?

It depends on him. If he is in other inmate's business, they will find a way to be in his business. If he keeps to himself and shows the respect he will not encounter any problems. It is when inmates "big deal" themselves which cause others to investigate their charges that you run into issues. Domestic violence charges are not as dangerous as sodomy potentially could be. Our advice, keep your mouth shut.