I will post a copy of a Face Book photo here along with the link to the "must read" article.
"I remember when, as a younger veterinarian, the reps who promoted prescription diets would say, “Be sure to tell your clients that the diet is not guaranteed to prevent recurrence of the condition. However, be sure the pet doesn’t eat anything else.” While one pet after another did have a recurrence, I began to question why a prescription diet was necessary, or for that matter, even a good idea!
Now, it’s been well over a decade and I’ve run a successful holistic practice without using any prescription diets. We manage or cure disease with fresh, healthy species-appropriate diets."
http://www.dogsnaturallymagazine.com/why-your-dog-doesnt-need-that-expensive-prescription-diet/