Horse Veterinary Questions? Ask an Equine Vet.
I am sorry your horse has this non-healing wound.
Horses can be amazingly resilient and even the most horrendous wounds can heal eventually with time. I imagine if the initial trauma and subsequent wound occurred over the carpus (knee) area, its continued movement is delaying the healing.
The priority is that he is comfortable, and pain free which you report, so this is great. With regards ***** ***** up the healing process there are a couple of things you could do. Firstly, just wait and eventually it will heal, cold hose it daily to keep the area clean and to minimise swelling which may occur from time to time. Secondly, you can combine the previous management with the liberal use of Manuka honey, it should be readily available in Australia and this can have phenomenal effects on wound healing and skin regrowth. It can be used liberally, medical grade is best but shop bought should be OK. Just be mindful of the potential attraction to flies.