[Hound Dog Mom]

Hi wantthebest4myk9 –

I would be very interested in seeing these (non-existant) sources that prove protein causes kidney failure. Could you cite them please? I’m very familiar with the Merck Veterinary Manual, in fact I have a copy in front of me, and I can assure you it says nothing of the sort. The only instances in which high levels of protein can be harmful is if a dog has certain chronic medical conditions – i.e. liver shunts, late stage kidney failure, etc. – high levels of protein do not cause these conditions (there’s a difference).

Here are my sources. If you’d like to see more let me know.

Excerpt from “Small Animal Clinical Nutrition 4th Ed.”:

“Feeding protein above requirements to healthy dogs and cats does not result in toxicity because the excess amino acids from the protein are catabolized and waste nitrogen is excreted.” [this is a passive process that does not stress the kidneys]

This is an excerpt from “Pet Food Safety: Dietary Protein” by D.P. LaFlamme, DVM, PhD, Dipl ACVN:

“The ability of dietary protein to to induce renal pathology was studied in both dogs with chronic kidney failure and older dogs without chronic kidney failure. One study, undertaken to contrast the potential renoprotective benefits of protein restriction or phosphorus restriction, compared four carefully controlled diets. The results showed that protein had no adverse affects, even in dogs with kidney failure, although phosphorus restriction did protect against worsening [pre-existing] kidney failure. Two other studies evaluated older (age 6 to 8 years at the start of study) uninephrectomized dogs that were fed either dry diets containing 18% or 34% protein or canned diets containing 22% or 36% protein. No adverse effects from dietary protein were observed. On the contrary, mortality was slightly higher dogs fed the lower protein diet.”

The summary of LaFlamme’s article states:

“Based on a comprehensive review, there remains no evidence that dietary protein causes kidney damage, or any other adverse effects, in healthy dogs.”

This is an excerpt from “Focusing on Protein in the Diet” by TJ Dunn Jr. DVM:

“Ahhhhhh … I know what you’re thinking! Too much protein! Kidney damage! Well, guess what? The very early research that pointed a finger at protein as being a cause of kidney failure in dogs wasn’t even done on dogs! It was done on rats fed unnatural diets for a rodent — diets high in protein. (Were we tinkering with Nature during these “tests”?) Rats have difficulty excreting excess protein in their diets because they are essentially plant eaters, not meat eaters.

Dogs are quite able to tolerate diets with protein levels higher than 30 percent on a dry weight basis. Dogs are meat eaters; that’s how Nature made them! Rats are not. So some of the early research on rats was assumed to be true for dogs … and the myth of “too much protein in a dog’s diet causes kidney damage” was started. And just like any seemingly valid rumor or assertion, it derived a life of its own and is only recently being accepted as untrue.”

This is an excerpt from “Kirk’s Veterinary Therapy XIII, Small Animal Practice” by written by Finco, Brown, Barsanti and Bartges:

“…restriction of protein intake does not alter the development of renal lesions nor does it preserve renal function. Considering these (research) findings, the authors do not recommend reduction of dietary protein in dogs with renal disease or reduced renal function in order to achieve renoprotective effects.”

Dr. Kenneth C. Bovée describes using dietary protein as a nutritional management approach in dogs suffering from kidney disease as “a medical myth”. The common belief that moderate and high protein diets cause kidney disease is also unsubstantiated. According to Bovée:

“Results of the 10 experimental studies on dogs have failed to provide evidence of the benefit of reduced dietary protein to influence the course of renal failure.”

• This reply was modified 11 years, 11 months ago by Hound Dog Mom.
• This reply was modified 11 years, 11 months ago by Hound Dog Mom.