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For some dogs, digesting protein can be difficult on the kidneys and liver. For older dogs, kidney and liver problems can cause the dog’s health to deteriorate quickly. Low-protein dog food helps animals that have kidney, liver, or bladder problems (such as bladder stones). Most dog food has at least a 25% protein content. Low protein food, on the other hand, will have protein levels of 18% or less — usually much less. Dogs need protein to maintain lean muscle mass and energy, so choosing a low-protein diet should only be done with the help of a veterinarian. In fact, low-protein food often needs veterinarian approval to purchase.
