My poor dog got a fungal skin infection that went from a few spots to covering him really quick. The vet wanted to give him probiotics and fish oils plus a shampoo like this and a large bill when I needed more so I got them myself and this shampoo has been working great.
I'd recommend to anyone in the same situation is to keep on the twice weekly routine if that's what you're doing as it can come back fast if left too long between washes. I also got the skin serum from this brand which is brilliant too now that he has large clear patches with little hair. Hopefully he'll be back to full health and full hair soon