First picture 15/06 second is today 24/06. The light spot on the upper wing of the frog in the first picture conceals an abcess which blew out to the side. You can see the sole is starting to shed. The second picture shows the abcess hole growing out and how the sole is flaking off.
We struggled for ages with the hinds stubbornly staying pancake flat. It may be coincidental but the sole started to shed when the abcess relieved. The hind feet are not concave yet but they are on their way (long may it continue).