We get this question a lot. So much so that we wrote an article about it. You can find it here. Bottom Line: If your dog has a yeast or bacterial infection, you should absolutely support your dog with a tea tree dog shampoo like 4-Legger's tea tree oil dog shampoo with peppermint and eucalyptus. 4-Legger's organic Peppermint and Tea Tree shampoo for dogs uses a pure unadulterated USDA Certified organic tea tree oil in a tri-blend and is diluted to be a safe, all natural, effective alternative to medicated dog shampoo. We are all becoming very aware of how Ill-advised it is to accept just about everything that shows up in print these days.