Matted hair dogs versus standard coated dogs are different. pH shampoos can still mess up the pH (everyone's pH is slightly different). My farm owners have a long coated collie, never been bathed in her 5 year life - but brushed every 3 days. if I have to bathe rev, I rinse in her apple cider vinegar, keeps her from getting dry skin. I had a dog who had skin issues for 15 years, that i bathed every 2 weeks with vet shampoo....she had a bloody hotspot her entire life. come to find out, had I just used some ACV and didn't bathe her, she probably wouldn't have. It's worked for a lot of dogs physically around me for now at least. rev gets smelly but from doing outdoorsy things generally. her only downfall is frito paws in bed lol