It finally occurred to Sirius that he might be able to help with that. His magic now was-- well it was crap.

"Ah, sorry. Normally magic doesn't help werewolves, but can I try a quick healing spell?" He wanted to reach for his wand, even after all this time, but that was just something he'd have to live without. "It shouldn't hurt."

It was not a spell that worked well at all on Remus's wounds. Cursed wounds required entirely different spells. But they'd already established that Stacia was very different.