[quote="ladybugracer"..........
......Laugh if you will, but I have heard that Monistat works wonders on this stuff!

Makes good sense...logically, it is an anti-fungal medicine, but made me laugh too. Us horse-folk are some weird ones, ain't we?
I hope this helps.

[/quote]
Actualy, yes........ Monostat-7(cream) works very well on most any fungus infection. In many cases, it even works when Tinactin won't work....but be cautious where you put it. There might be side effects with hoof-contact, be carefull about using it on broken skin and for sure don't get any in the eye.
You can save some money by buying a drug-store "house brand". Just make sure that what you are buying list the active ingredient as " Miconazole Nitrate 2%".
It's good stuff. I've used it years on dogs, horses, and on myself. On me, it cleared-up a bad case of athlete's foot that I had a few years ago.
You'll know perty-quickly whether or not it's going to work for your particular application. If it does, continue it's use for the full 7 days...even if it looks like the symptoms are gone.
That's just my 2-cent's worth.
Your Vet may say something completely different.
DGW