My experience with this was last June. Severed in 2 spots and vet had to remove 2 inches of it because it was dirty from the injury. Bone was exposed arount the whole front of the cannon. Very bad injury and horse was at hosptial within 2 hours of injury. 2 days at hosptial and then home for the most intense bandage changing Ive ever been through including splints for a few months to steady the leg. 8 months go by and he is sound but still on rehab. Hopefully he will be 100% by the sumer and I can ride him again.
I will say that I am (as is my vet) amazed that he moves like he does with how much damage there was. I would not have believed it, if not having been through it personally.
I did deal with plenty of proud flesh through the healing process. I used many different things to keep it under control. I had to cut is several times and also used meat tenderizer on it (of course nothing was done until the bone was 110% covered). Getting the bone covered was #1. After that I worked on getting the wound to heal.
Also for the first 2 months he spend most of his time tied up so he could not move a lot and could not lay down. He was on a few supplements for his gut because of the antibiotics, pain meds and stall rest.
Best of luck… its a long road, but well worth it. IMO