[Shawna]

Hi Elyce M,

You are right to question this. There has been LOTS of science over the last 20 years that proves protein is not only not damaging to kidneys but the science has shown that protein does not further damage the kidneys of dogs that HAVE kidney disease. Protein does increase BUN in the blood and if BUN gets too high it makes puppy not feel well but it has no ill effects on the kidneys whatsoever. My favorite source of scientific information on this is “Mythology of Protein Restriction for Dogs with Reduced Renal Function” by Dr. Kenneth Bovee http://www.championpetfoods.com/wp-content/uploads/2014/12/Myths_of_High_Protein.pdf

Something as simple as dehydration can cause elevated BUN but if creatinine is high on the blood work than that is an indicator of kidney disease. Elevated BUN AND creatinine won’t show up on blood work until the kidneys are about 75% damaged so an elevation of both should be looked at more closely by doing more testing – urine specific gravity as an example.

If your pup really is in the beginning stages of kidney failure than lowering protein isn’t necessary but feeding “high quality” protein can be very beneficial. It is also advised to feed a wet food over a kibble. It is also beneficial to look at foods that are lower in phosphorus than your average diet as phosphorus can begin to build up in the blood and once it does it CAN damage the kidneys further.

For what it’s worth, my puppy had kidney disease from birth and ate a HIGH protein raw diet (between 45 and 54% protein) her entire life. She lived to almost nine years of age and passed from complications not related to normal progression of kidney disease.

Seven years of age is not old for a Shih Tzu but they also now know that senior dogs require a diet higher in protein than their adult counterparts due to a decreased ability to digest. This is taken from Purina’s website
“Protein for senior dogs. Healthy senior dogs require increased dietary protein in order to maintain lean body mass. We formulate our senior dog foods to contain more dietary protein (compared to adult maintenance formulas) in order to ensure that your dog gets the appropriate levels of nutritious protein he needs.” https://www.purina.com/dogs/understanding-dog-food/is-a-high-protein-diet-best-for-my-dog

Most better quality diets already exceed the minimum suggested for seniors of 25% (minimum not suggested amount) but this is a science based paper discussing the increased needs of protein in senior dogs. http://www.ncbi.nlm.nih.gov/pubmed/18656844

• This reply was modified 8 years, 10 months ago by Shawna.
• This reply was modified 8 years, 10 months ago by Shawna.
• This reply was modified 8 years, 10 months ago by Shawna.
• This reply was modified 8 years, 10 months ago by Shawna.