My 4 year old ACS has suffered with yeast infections and allergies for the last three years. We've been backwards and forwards to the vets - AB's and steroids, bathing , changing diet etc. Have tried Camrosa which worked for a while then didn't do anything for her. I was reading one of my daughters horsey mags and came across a product called Stop It All
http://www.karenruggles.co.uk/It's a shampoo and semi solid salve, bathing every four days and applying the salve daily and within 24 hours it had started to clear up - and she was covered in "scabs". I tried it on some that were just starting and they went within a day. I also got her some probiotic capsules from the same lady and the effects are (so far) amazing. It stinks to high heaven but as long as the poor thing isn't scratching I'm happy.
If you ring her, she'll advise you. It's all natural.