The tough thing about phosphorous is that higher protein usually comes with higher phosphorus. A lot of the premium diets these days have high protein, high fat, and lower carbohydrate levels. This brings a higher phosphorus level. Whether a low protein diet is beneficial for dogs with renal insufficiency is controversial but many of the veterinary specialists now say protein should not be severely restricted until the animal is in a more advanced stage of renal disease.
You could ask your vet to hook you up with a veterinary nutritionist– maybe a homemade diet would be an option? Another good quality food that can be custom made (but at a significant investment price) can be had from Just Food for Dogs. You can Google their web site.
If your dog starts feeling worse, getting him to eat will likely be one of your challenges. Be prepared to use bits of different foods and recipes to keep it interesting!
Tabitha
http://naturalalternativesvet.com
