It's hard to tell by the picture.
Is that black part, Baily's toe nail sticking out or
all black skin? Rocky's toe nail was cut off all the way back
"into the quick", you could not even see any nail.
It was all new growth comming out of his toe.

IF that is her toenail, I bet their will be new healthy nail growth
comming out, and the black part of the nail is dry blood/bruise will either fall off or you can eventually trim it, as her healthy nail growns in.

Vet call is free, now I want to know. lol