Hi Jez,
Just saw this - I've been adding to my thread on alternative cancer treatments of pets and saw your thread.
Mushrooms are the new up and coming miracle treatment.
They are anti-fungal, anti-viral, anti-cancer, anti-tumor. No side effects reported in all of the clinical studies done.
I don't know if using a solution of say, turkey tail mushroom powder, applied to the nail would work - paint it on and then wrap the toe.
Or taking double the dose listed on the bottle, orally, - tree mushrooms are anti-fungal. There are various ones - Reishi, Turkey Tail, Cordyceps, Maitaki, Lion's Mane.
I get my Turkey Tail mushroom (and others) on Amazon - buy organic, grown in the USA. In capsules. Easy to take.
There is a complex of mushrooms on Amazon also. I've used that before too. Since their medicinal action is synergistic - taking two or more different mushrooms really increases their medicinal properties - better than taking just one.
I would be interested in knowing if this would work on nail fungus. It's an expensive treatment.
I think these tree mushrooms can be purchased in powder or capsules in health food stores.