★★★★★
The thing that I have found that has helped the most is yogurt, Natural plain organic probiotic and should contain Bifidobacterium and Lactobacillus acidophilus ( Yeo Valley ) is one,
For a medium sized dog collie etc, one tablespoon in food morning and night, will take a week or so to see real improvement and may suffer from loose stools to start with.
Medicated shampoo did help the first time used but as it strips the oils out of the skin dandruff etc returned for a few days then slowly cleared up, do not overwash the dog unless advised by the vet also for his chin used 1 pint boiled water with 1tsp salt (cooled)to wipe his chin with cotton balls after eating so no bacteria can build up,
For the yeast and allergies to build up there must be an underlying cause so am going to switch his food and try something with a higher protien content, this will take some time as can take a while to show results but at least it seems to be under control and a big improvement on what he was like before, will also be starting omega 3 tablets once the food is sorted out as this also helps skin conditions and a lot of dog foods do not contain enough.