Well, here's the thing.....we never did figure out what it was. Treated it for SLO, no change. Treated it for fungus,
no change. Treated with antibiotics, several kinds, topicals, jeez, I can't even remember what all. Oh, tried different
foods, too, thinking it might be a food allergy. He wore baby socks to keep those spots clean. At any one time, several
toes were affected. all on different feet. The vets were stumped.
I work at a vet clinic, and a drug rep came in for a lunch/learn for Atopica (cyclosporin) for skin issues. I showed him
photos of Desi's feet, and of course, he'd never seen anything like it, but offered me a few boxes of Atopica for free just
to try. Started out taking it every day, then every other day, then 3 times a week, etc. By the time the 3rd box was gone,
his feet looked much better. He finally got down to once a week, and stayed there for a whole year. By that time I was
buying it myself, and the stuff is expensive, so I tried weaning down even further, then would forget a dose or so, then
finally just quit.
Cyclosporin is an immune suppressant, so who knows what it really was, but it's fixed now. He's not been on it for several
years, and has had no further problems. Your guess is as good as mine, but it worked.