ron2
Posted : 5/28/2006 6:58:10 PM
Actual scientific studies have shown that, in a healthy young dog, high protein levels do not stress the kidneys. But through illness, age, or both, kidneys can become weak and not as readily able to process protein.
For example, my cat, who lived almost 17 years on Purina's DeliCat. At about 16, she was diagnosed with diminished kidney function by our vet. That is someone who went to school and studied this stuff and has been a vet for about as long as I have been alive and I am an old fart. As opposed to someone else who's read anti-kibble websites for a year. Anyway, a by-product of consuming animal protein is the release of nitrogen, which is then filtered out by the kidneys and passes out of the body in urine. When the kidneys can't do so well, the nitrogen backs up in the bloodstream, similar to the "bends," and creates lethargy and nausea. The doctor then had me feed her Purina NF (kidney formula) and she lasted about another year. She simply got old. I expect, if I reach 120 years of age, I may have a few problems with some of my organs, too.
The same could be said for a dog. OTOH, dogs fed too much protein and fat can become obese and then suffer maladies from the obesity, which may in turn lead to kidney problems. That is, the protein itself is not harming the kidneys but other problems may impact the kidneys which can then have problems processing the protein.