laconrad,
I spent an hour creating a post last night only to have it disappear. I’m guessing it was all the links include so in this post I’m only going to include a few links but I most certainly can provide them if wanted.
I definitely agree that dogs shouldn’t eat nothing but meat, or even meat and bone exclusively but it is an absolute fact that they have no physiological requirement for carbohydrates. Waltham is a reliable source of info on this —
“Cats and dogs can sythesise their own blood glucose from amino acids.
Carbohydrate, therefore is not an essential macronutrient. However,
if provided in their diet, cats and dogs can utilise carbohydrates and
they are used in pet foods as sources of energy and dietary fibre.
Carbohydrate levels tend to be higher in dry pet food than in wet
pet food.” https://www.waltham.com/dyn/_assets/_pdfs/waltham-booklets/Essentialcatanddognutritionbookletelectronicversion.pdf
In fact, the AAFCO (as of 2008 at least) doesn’t have any requirement for carbohydrates in the canine diet. There’s a minimum for fat and a minimum for protein but no required carbs. Many complete and balanced canned foods have no added carbs at all.
For the record, I do think certain vegetables and fruits are beneficial in the canine diet but protein and fat should not be displaced with any carbs. I personally have no use for most grains but I do utilize foods with millet or quinoa sometimes (to mix things up).
Dogs have been eating kibble for less than 200 years. Evolution doesn’t happen in 200 years. Yes, I would agree that my dogs ancestors probably got some carbs as table scraps however carbs in kibble is not the same as carbs in fresh, albeit possibly cooked, carbs. From my understanding grains weren’t processed in the manner we process them today either. Not to mention GMOs, glyphosate / etc and hybridization to increase the protein content wan’t a thing back then.
Ammonia is not toxic unless the liver is damaged and I’ve never read any research (even in humans) suggesting excess protein caused cirrhosis. Yes in cases where the liver is excessively damaged, or a shunt, limiting protein and feeding certain kinds, like dairy, helps alleviate ammonia from building up but it doesn’t damage the liver. I would agree that 78% of the amino acids in certain meat proteins is all that is used but the bioavailability of commonly used plant proteins aren’t any better and often worse.
Excess fiber in the diet can actually bind up minerals and prevent their absorption. Grains and legumes have anti-nutrients like phytates and enzyme inhibitors as well as lectin proteins which in susceptible persons and pets can lead to illness including some pretty nasty disease (even autoimmune disease). Although possibly not “nasty” I recently read research suggesting gluten as a cause for “Canine epileptoid cramping syndrome” in Border Terriers. In humans these lectin proteins from certain carbohydrates is also considered a factor in IgA nephropathy (a form of kidney disease) as well as type 1 diabetes (the kind dogs get).
Protein absolutely does not “cause” damage to the kidneys and some reports suggest dogs with kidney disease actually have an increased need for protein. They now know that “senior” dogs actually have an increased need as well – “as much as 50% more protein” and minimums for seniors is suggested at 25% — “minimum”. My favorite source of info on protein as a cause / contributing factor to kidney disease is “Mythology of Protein Restriction for Dogs with Reduced Renal Function” http://www.championpetfoods.com/wp-content/uploads/2014/12/Myths_of_High_Protein.pdf
There are two papers published in the Journal of Nutrition suggesting that overweight dogs, even “obese” dogs, lose just as much weight (albeit slightly slower) on a high protein diet, 56% protein, as those fed higher fiber diets without the “muscle wasting” that is often seen in lower protein fed dogs. The body will break down muscle when it’s amino acid requirements aren’t being met through diet.
