I have been trying to get my mare's frog healthy. Her central sulcus was quite deep. I trimmed the ratty bits and have been treating it for thrush. The groove was deep and narrow. It obviously widened up slightly when I trimmed the ratty bits. It has been kept quite dried out with my treating with the powder 'no thrush' and stuffing with cotton. I now have noticed that, although it is still deep, it is getting much wider....so much so I may not be able to keep cotton stuffed in it any longer. Is this a good sign? Will it level out?