@Lucy
Yeah, the names I suggested may be put up! In fact all names I suggest can be put up!
As for Flame, I don't see how a fully paralysed cat would live, so for the sake of what I know (Brairlight's a good example from the canon) it's just the back legs. Maybe she goes exploring around the base of cliffs, which can be quite dangerous and while climbing them, she falls and a rock (loosened by the rubble and centuries of erosion) crushes her spine? It'd also effect Feather, making him extremely over-protective and paranoid. He may get so paranoid to the point he is so scared of his own tribe mates (and the rogues of course) and Flame possibly ends up being depressed so some cats will have to put them right!
@Puggo
May I suggest a different name, seeing as I can word them a little differently? I don't mean any insult, I'd just word them differently that's all.