But My Vet Says Too Much Protein is Hard on My Dog’s Kidneys

by Jim McBean on January 12, 2010

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Oh brother! **rolls eyes**

Ok first, let’s understand what protein is and the role it plays in mammalian nutrition. I’ll get to the “too much” part and the “hard on the kidneys” part later in the post.

Protein is one of the three macronutrients along with carbohydrate and fat. Macronutrients aid in building and repairing tissues (mainly protein), provide a source of energy (carbs/fats) and regulate various body processes, and they must be consumed (eaten), as they cannot be synthesized by the body.

Proteins are made up of amino acids, sometimes referred to as the “building blocks of life“. Humans require, from their diet, 8 Essential Amino Acids and canines require 10. “Essential” means they cannot be synthesized within the body, and therefore must come from food consumption.

What exactly does Too Much Protein mean?

The fact is that nobody knows what too much protein means with respect to dogs, but a dose of common sense tells us that if they evolved eating meat, and large quantities of it, that it’s probably pretty difficult for a dog to OD on protein. The myth of too much protein has been propagated by the pet food industry because corn and wheat are cheaper than meat. Plain and simple!

“The dog can digest large amounts of proteins, especially those of animal origin” stated Prof. Dominique Grandjean DVM, Ph.D., at the Fourth Annual International Sled Dog Veterinary Medical Association Symposium (page 53 of 1997 PROCEEDINGS).

Contrary to the too much protein bandwagon, a deficiency in protein can lead to muscle loss and a compromised immune system among other things.

“Protein deficiencies can be caused by protein not being absorbed properly, and poor quality protein fed to pets. Effects of protein deficiency include weight loss, weakness, and decreased immune function, as well as lower levels of nutrient absorption, and a higher risk of overgrowth of bacteria in the small intestine.” – Source: Marge Chandler
In Practice vol 24 no 9, October 2002: starts p528

The “poor quality protein” mentioned in the above quote refers to incomplete proteins (not containing all essential amino acids), from plant based foods.

But my vet says too much protein is hard on my dog’s kidneys!

Shocking!!

The following statements are quoted from CANINE AND FELINE NUTRITION  by Case, Carey and Hirakawa, Published by C.V.Mosby, 1995 Source: The Pet Center

“There is no conclusive evidence showing that protein intake actually contributes to the development of kidney dysfunction in healthy animals.” (page 117)

“It is recommended that the protein in the diet of geriatric dogs should not be restricted simply because of old age.” (page 256)

“In general, high-quality animal source proteins provide superior amino acid balances for companion animals, compared with the amino acid balances that are supplied by grain proteins.” (page 174)

Nature designed dogs to be meat eating machines. She, (Mother Nature) wrote the blueprint. Are we so arrogant as to assume that the plans she was working from were flawed and that dogs are better off eating processed kibble or tofu and beans?

“The grain-based diets for dogs did not even exist until seventy years ago when we humans demanded the convenience, simplicity and economy of dog food in a bag.” -  The Pet Center

Think about it… do you ever see a stray dog grazing in a corn or bean field to allay its hunger? Nature has created a meat-eating machine in the dog and every day in practice I see the health benefits displayed by the feeding of meat-based diets. Dogs fed poor quality diets look and feel great only if their caretakers also feed table scraps such as chicken, meat, eggs, cottage cheese and other “left-overs.” Meat such as chicken, poultry, beef or fish should be the first ingredient listed in any dog food you judge to be “the best”. – The Pet Center

If you want a healthy, happy, long lived companion, get your head out of your……..wallet, and go raw!

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  • Great article! I have actually read studies listed on the Champion Pet Food website (Orijen Grain-Free kibble) that shows that there was no danger to the kidneys when fed high protein diets and it did no further damage for those with kidney issues. Meat - it does their bodies good! I've heard the lower protein is better from people I trusted in the pet food industry, but unfortunately, I think they just fall into this "old-school" category of lower protein is better - kind of like the "earth is flat" school. Of course they leave off what HUGE % of grains and carbohydrates are in their food when you read the label (except for a few grain-free's that are happy to show how low they are!). My dogs are loving their RAW!
  • "Meat - it does their bodies good!" I've heard that. =)

    In bodybuilding (my ancient history), the rule of thumb was 1 gram of quality protein, (meaning complete proteins from animal sources), per pound of body weight. If I recall, the RDA with respect to protein requirements for people is something like .7 or .8 grams per kg of body weight. Since a dog's main macronutrient requirements are protein and fats (minimal carbohydrate), I think it's logical to assume that on a per pound basis they would require more protein.
  • Thanks for your comment Rob.

    Actually, if I were going to feed kibble Orijen would be my first choice, with Evo running a close second, but that's another post. :)
  • jersey was a very fussy eater when she was a puppy and didn't eat any kind of canned dog food and especially not kibble. it forced me to make her dog food that she would actually eat. At first it was a pain in the butt, but after learning more about pet nutrition and then the melamine scare, i'm really glad that i do it now.

    i never used to think twice about the content of kibble, but after reading the dog training for dummies book written by the volhards, i started to notice. the volhards say that of the first three ingredients listed on the package, two of them should be meat. most dog dry dog foods are corn or rice based and since dogs aren't cows, that's just not cool. since i have a treat ball for jersey to keep her amused in the afternoon, i usually give her the salmon formula from before grain. it's really good and obviously has no grain.

    for her daily dinners, i get her whatever organ meats are on sale at the local asian market, boil them up, and add the honest kitchen preference veggie mix. she also gets table scraps of all kinds and the occasional bone. i've been feeding her this way since she has been a puppy and she looks fantastic. most people that meet her can't believe that she is almost seven years old!

    big dog food complanies can stick it where the sun don't shine! until the golden age of consumerism in the 50's, commercial dog food wasn't widely available and everybody either made their own food or fed their dogs from the table. it was companies like purina that made that silly "don't feed your dog table scraps" myth.
  • "big dog food complanies can stick it where the sun don't shine!"

    I love the way you think Bloggie Stylish! :)
  • i would have used harsher language, but i'm not sure if swearing is allowed :)
  • Yes, I've visited your blog and the language is colourful... LOL DB is a family blog. ;)
  • Actually, we were a "victim" of this school of thought for our Shar-Peis (the breed is subject to kidney conditions) and bought "protein friendly" kibble. As you know now, we have switched to a dehydrated raw food diet from The Honest Kitchen. I am now worried about too much silver ... as in the dogs love the new food sooo much they lick the bowls to no end!
  • too much silver!!! LOL that was good.
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