Scratches or wound on OTTB- Treatment advice???

We just acquired an OTTB, and he came with an abrasion to the rear pastern. We were told he got it during his last race only 3 days prior. I'm not sure of injuries that can happen during a hard race that leave the pastern raw, he is shod all the way around. Please advice me if there are. Anyway, he was a bit swollen and sore to the touch, and presented himself off for the first few steps at the trot but worked out of it. Skin was bright pink and scabs were evident. They said they hadn't treated it at all. So we put Furizone on him and wrapped him up for the trailer ride to his new home. We got him settled in cleaned the wound thoroughly and reapplied ointment. Then decided to let him be in his stall and check later. Only 4 hrs later the swelling to his leg had gone down by 90% (I was amazed). Gave him some Bute and reapplied ointment for night and followed that routine for the next 2 days. Currently is off Bute, wound is looking better but very slowly, no more swelling. Still not happy to let us touch it and get it cleaned and medicated with Furizone but improving slowly. Still seems slightly off when asked to trot on that leg.
I have never had issues with this type of "wound" or severe a case of scratches before. Can a wound from racing turn into something like scratches, especially since he was stalled pretty much 24 hrs a day while at the track, and should we change treatment plan is it improves, how fast is typical improvement, etc. We have had him for one week at this point. Is there anything else I should be looking for? The Vet is supposed to be coming soon for Fall shots but if I have to call him in sooner I will.
Thank you,

I would stick to what your doing, it seems to be working. I also believe that less is more, I wouldn't mess with it too much, cleaning it too much can aggravate it, and if it's sore that's no fun for him. Just put a little more medication o, or even do medication everyother day. The vet can give you better advice though

I don't think there's a need to have the vet out earlier, but it is convenient that he's coming soon, get him/her to check it out.

I wouldn't work him too much until you know from the vet what is going on. A good walk to keep the circulation going should be sufficient.

Is it on back of his pastern/fetlock? If so sometimes horses in mid stride will overflex their fetlocks and get "track burn" as their skin rubs along the track surface. This sounds to me like this is what happened but without pics or more info it's hard to tell. If it is "track burn" it's basically just like our version of carpet burn and is sore and tender and takes a bit to heal but isn't serious. I would continue with the creams and maybe some cold hosing wouldn't hurt to keep the inflammation down and it feeling good for him. As far as calling the vet, unless it gets worse I would wait for the scheduled appointment.

That's what the groom basically said but used a term I hadn't heard before and I couldn't find anything on the internet about it
Thanks a lot. It's looking better everyday, new hair growth now too. Still doesn't feel great but is a little less painful everyday!
Makes me feel better.

The ointment your using is amazing stuff that saved my little dogs foot that was almost cut off by a horse GOOD STUFF : )