Has the problem continued?
I came back to this post because Pukalu is doing it so much now. If it doesn't subside, we already have an appointment next week for his skin issues.
He's always been a "cleaner dog," licking himself like a cat. And he cleans Muka's ears, too.
He's always licked his anus to the point of it annoying me! I just gave up and let him do it and got over it. It's not an all day thing, just a few times a day I think to clean himself.
But now he's doing it much more often.