Diet for Dogs with Kidney Disease: Slowing the Progression

1. Reduced Phosphorus This is the most important intervention. High phosphorus levels accelerate kidney damage.

• Goal: 0.2–0.5% phosphorus on a dry matter basis
• Veterinary renal diets are specifically formulated for this

2. Moderate, High-Quality Protein The old rule of "low protein" has been refined; current recommendations suggest a moderate amount of high-quality protein.

• Goal: 14–20% protein on a dry matter basis
• High biological value sources (eggs, chicken, fish)

3. Omega-3 Fatty Acids Research shows that the anti-inflammatory effects of EPA and DHA can help slow the progression of kidney damage.

• Fish oil supplementation
• Always work with your veterinarian to determine the correct dosage (based on weight-specific EPA+DHA levels)

4. Ample Hydration Concentrated urine damages the kidneys. Increase water intake by:

• Increasing the ratio of wet food
• Providing multiple water bowls
• Soaking dry kibble in water (do not give bone broth to dogs with kidney disease; the phosphorus leached from the bones puts a strain on the kidneys)

• High-phosphorus foods: bones, bone meal, animal by-products
• Excess salt: strains the kidneys and increases blood pressure
• High-protein treats (large quantities of dried meat)
• Cheese, salami, sausage

Dogs with kidney disease often struggle with a poor appetite. Helpful tips include:

• Warm the food to release its aroma
• Use wet food, which is often more palatable
• Feed several small meals throughout the day
• Hand-feeding can sometimes help
• Use appetite stimulants (such as Mirtazapine) per your vet's recommendation

• Veterinary (prescription) renal diets, obtained through your vet: tailored to the specific stage of the disease
• Veterinary renal formulas: these ensure the principles above (reduced phosphorus, appropriate protein, omega-3s)
• Senior diets: these are not renal diets and their phosphorus content is not restricted, so they cannot replace a renal diet; from IRIS stage 2, a veterinary renal diet is recommended
• BARF / Homemade: only if formulated by a veterinary nutritionist

The specific prescription diet should always be selected by your veterinarian based on kidney function (IRIS stage).

SDMA, creatinine, BUN, and phosphorus levels should be checked every 3–6 months. The strictness of the diet depends on the stage (IRIS 1–4).

• Water intake: Is it increasing?
• Appetite: Is it decreasing?
• Vomiting or diarrhea: Potential signs of uremic gastritis
• Weight loss: Muscle wasting
• Bad breath: Monitor for an ammonia-like odor

This information is for educational purposes. Adjusting a renal diet must be supervised by a veterinarian.