apple cider vinigar,you can buy it at health shops ,make sure its unfiltered,i use it on annies itchy bits as shes still a bit itchy but not nearly as bad ,i also put it on her food as she wont take it in her water,just a desert spoon every morning,shes responding very well,but if it is a yeast problem then the only way to get rid of it is to not feed anything that can convert to sugar as carbs make sugar and sugar makes yeast,you may have to rethink kibble ,its only my opinion as the pics do look like bad yeast ,others may think differently ,but to be honest trying to deal with it yourself with natural remmedies is far better for the dog than medication which lowers the immune system thus leading to more problems and medication very rarely cures the illness just the symptoms,only my opinion though,karen