Since you are that close to your vet, personally, see if he will just sell you the injectable antibiotics and give the shots yourself. It is not hard to do, I'm sure he will help you with the first one. With an aggressive round of injected antibiotics and the antibiotic ointiment everyday, he may stand a good chance. I'm no vet but have helped deal with stuff like this before and have learned a lot from my vet (a very good exotic vet)...my vet would treat this with Baytril every other day for a month, .4cc/1000g. Please let us know what your vet says