Both Fungasol and Vetericyn scrub are designed to treat both bacteria and fungus. Scratches and rain rot are both listed on the bottles as conditions they treat. We've been treating the condition for close to a month now and there has been a huge improvement. Since one element of treatment has been regular washing I thought I would ask since we won't be able to continue to wash when it gets too cold. Clipping would probably help especially as he begins to get his winter coat.
The boots look like a great idea. However this horse is not actually in a muddy or damp pasture at the moment. The environment is not an issue. I am guessing he's had this condition for a very long time and no one has bothered to treat it until now. I don't think he was groomed regularly until recently either.
Chloroxylenol, the active ingredient in Fungasol, isn't in a strong enough concentration to kill the bacteria that causes scratches - which is why you're still battling with it a month after starting treatment
It's a useful cream to use as a barrier and a defense,
after you've washed with Hibiscrub and thoroughly dried the legs
If you can dry the legs after washing in cold weather, then as long as it isn't actually freezing, it won't be a problem - we use hair drier (obviously be sure to desensitize a horse first), though the last horse we had to treat had no objection to us using a rechargeable leaf blower to dry his legs
Dermatophilus congolensis, the main cause of scratches, lives on the skin, several studies were done a while ago that showed that it wasn't present in the soil on any of the land that affected horses in the trial were kept on.
It's benign until the horse is subjected to conditions that create areas of softened, slightly damaged skin, that allows the bacteria to penetrate and multiple, causing infections, soreness and scabbing
This link gives some useful guidance
Mud fever in horses - World Horse Welfare