"That's not what I'm talking about," he said quickly; a knee-jerk reaction he couldn't help but say in a voice that was a bit harsh for someone like him who rarely raised his tone. But this was Sirius. He couldn't help but be on edge about it.
"I know what Malfoy did to him physically. Everybody knows about that," he said, as much as he wished that wasn't true. But there it was. He'd acknowledged it out loud and it left a horrible taste in his mouth. "But something else happened too. Something's wrong with him and I don't know how to fix it." He was actually closer to being at his wits end about it than he even realized, now that he was actually verbalizing it.