Last week, we noticed it in back white socked pastern. He let my barn owner and I iodine wash it and pick the scabs off but now it's on the other back pastern and he won't let me touch either of them now. It must really be bothering him because when I had him lope today, he kept bucking with his back legs and he never does that. I try to wash the area with clean water and then had to fight with him to put corona on it. There was no way I could get to the scabs today. I went to the local feed store and bought some anti-fungal spray called Banixx and will spend most of the day tomorrow trying to clean the corona off and spray the Banixx on. I have a question, if I can't get to the scabs to scrap off, will it heal or do the scabs definitely need to be removed? Any other suggestions for OTC creams I can get.