I have found a can of Kopertox in the back of my tack room cupboard - used about 10 years ago for a case of ringworm. I have no idea if it is still usable but, given the recent publicity of the healing powers of copper, I was wondering if it would be an effective treatment for mud fever as they are both fungal infections. I have also discovered it no longer seems to be available in the UK and I would have to buy it from Canada. Does anyone know the reason for this. Is it a banned substance, may be like Dermobion, a really efficient treatment for mud fever ?