This was my girls injury when the proud flesh set in. I reckon if I had used yellow lotion from the start we may of avoided this stage! This is fresh with the bandage off so prior to cleaning but snapped it quickly before the flies came in too strong. I treated it the majority of the time with Silverzene. Very expensive. Was doing the job but very slowly. Finally used Yellow Lotion and this was the injury last week 24 hours after the bandage was first removed after being bandaged for 5 months. Personally in your case. I wouldn't or removed the bandage until it was more covered and I'd be taking your horse back to the vet and maybe look into having some cut away? But might be too late now?