Limpy

Three days ago Sylvie, our cat, came home with a limp. It appears that she has injured, perhaps broken, the finger on on one of her paws and doesn't put any weight on it. There is no cut or blood and she doesn't lick it and there isn't any significant swelling, so I don't think there is an infection. However, I am concerned that the limp looks like it is getting worse today. She is in a good mood, purring and so on, except that we won't let her outside.