Daisy has been licking between 2 toes on one of her paws recently, and it looks kind of raw and is reddened from the licking. Last night when doing our nail clipping/wrestling ritual, we noticed the nail on that foot is black around the area where it attaches into her toe. It turns out the black stuff is actually dried blood and it looks like she's done something to that toe and nail- maybe caught it in something or whatever. It doesn't hurt her, she's not limping or anything, and we can poke and prod it and she doesn't react any differently. I'm wondering, if she damaged the base of the nail, will it fall off like a persons nail can do?