Hi Linda,
Sorry to hear about your dog. I too have a black lab.
I wouldn’t have any concern feeding the Royal Canin Renal support. I understand that people don’t like corn and wheat and by products if that is your concern. As for myself, after spending a lot of time reading the published literature ( search Pubmed) I don’t have any concern about them.
In regards to kidney disease using plant based protein can be advantageous as the phosphorus is bound in the form of phytate. I read some interesting reports in humans that vegetable based protein for pregnant woman with kidney disease is preferred as then they can feed more protein needed for child development but not overly increase the phosphorus burden. Vegetable proteins are incomplete and need to be balanced with each other and or a animal based source. What is important is the overall balance of the amino acids. the body doesn’t care where they came from.
Foods sold without veterinary oversite will likely be inappropriate for most kidney disease patients who need restriction. Kidney disease is one area where customizing a diet through the use of a veterinary nutritionist is valuable.
