"Okay." Jack has met Romani before. He's never met one that cast any curses. But then, vampires where he comes from aren't the same. He could certainly imagine someone trying to, if they were that bad. (He has come under his own share of attempted magic, in the past, but it only rarely worked on the wolf itself.) "Did it work? Did he feel badly?"
I got the impression BtVS was not sensitive about much tbh