Some sort of skin fungus?
A few days ago, I was at the ranch and saw that my pony had a little hairless scabby area on the side of his head where the knot on his rope halter might sit. I figured that he had been turned out and something or other happened. When I came back today, it had grown, and there was another small spot on his chest. My trainer said it was a fungus, and to scrub it with anti-fungal shampoo every day.. Don't touch other horses, it's highly contagious, etc..
So, I scrubbed it with anti fungal shampoo and rinsed it off, and the hair and scabs on on the side of his face came off, but his chest is still scabby. It seemed extremely itchy and he was trying to rub his face on anything that he could. I trust my trainer, but not more so than a vet, or than the opinion of more than one person. Should I call the vet, or is there anything else I should be doing? I'm just confused because so far, he seems to be the only one with this at the ranch.