Glad you found it useful.
Cairo has two patches just under his chesnuts that never truely go. When they flare up - I apply the teatree oil, sulphur and sudocream mix and within 2 weeks all is gone, and stays gone for a month or so.
Pig oil and sulphur is my maintenance stuff which both mine have.
Luckily Cairo is clear everywhere else, and Chancer has yet to show signs - but I am fairly careful about checking legs, not getting them wet in winter and applying the oil and sulphur regularly.
Cairo has a poor immune and circulation system - due to chemo that he has had. It has improved over the years but we still pamper him.
Hope the clydie is well soon.