The following breeds are predisposed genetically to yeast infections: the West Highland White Terrier, Basset hound, Cocker spaniel, Silky terrier, Australian terrier, Maltese, Chihuahua, Poodle, Shetland sheepdog, Lhasa apso, and the Dachshund.
...
Shampoos: While degreasing shampoos such as the benzoyl peroxide (Oxydex®, Pyoben®) and sulfur/salicylate (Sebolyt®, Sebolux®) shampoos will help remove the skin oils feeding the yeast, there are shampoos that are specifically anti-yeast. We prefer the 4% chlorhexidine shampoo called Chlorhexiderm Max® or Malaseb® shampoo as these both strip skin oil and kills yeast; however, other anti-yeast products include Selsun Blue®, Miconazole® shampoo, Nizoral® shampoo, Douxo® shampoo and more. The pet must be bathed twice a week to start and the shampoo requires a 15 minute contact time (meaning do not rinse the lather for 15 minutes).