[anonymous]

Below are excerpts out of context from:

More Nonsense from Holistic Vets about Commercial Therapeutic Diets

Click on link for full article, you may find the comments after the article helpful too.

A recent article from the ever-unreliable Dogs Naturally Magazine gave some alternative vets a platform for repeating some myths and misconceptions about what are often called “prescription diets,” though this is technically incorrect. These are better referred to as “therapeutic diets” because they are intended to be useful in treating or preventing specific medical problems, not simply provide good overall nutrition, but they do not actually require a prescription, merely oversight from a qualified veterinarian.

Bottom Line
I usually write brief summary of my conclusions for these posts, but in this case I could not write anything that makes the point better than the following, again from a nutritionist knowledgeable about these issues:
All these arguments are just guilt trips and not based on reliable science and assume the quality of a final product depends solely on certain random criteria form the individual ingredients rather than in deep knowledge of the current state of nutritional science, excellent quality control during formulation, reception of ingredients, extrusion, and storage conditions.
What we have here is unsubstantiated belief presented as fact. And this kind of fear mongering has real dangers. There is, for example, very good evidence that feeding commercial diets for cats with kidney disease can reduce suffering and prolong life. Yet I have seen clients feeding unbalanced and completely inappropriate homemade concoctions instead because they have been frightened and misled by this kind of propaganda and are unwilling to feed diets with proven benefits.
As I’ve said many times, no one knows the perfect diet for any given patient, and I am open to the possibility that there are benefits to feeding alternatives to the usual canned and dry commercial diets. But these benefits must be proven, not simply invented out of whole cloth or wrung out of twisted misrepresentations of nutrition science.