Bone broth is generally not a good choice for dogs with kidney disease. The core problem is phosphorus, the very mineral that damaged kidneys struggle to filter. Bone broth is made by simmering bones for hours, which pulls phosphorus directly into the liquid. For a dog whose kidneys are already failing to clear excess phosphorus from the blood, adding more through broth can accelerate the disease.
That said, there are some narrow situations where a small amount of carefully prepared broth might help a dog who has stopped eating. The answer depends on the stage of kidney disease, the specific broth, and what your veterinarian recommends for your dog’s situation.
Why Phosphorus Is the Central Concern
Phosphorus management is one of the most important parts of treating kidney disease in dogs. Healthy kidneys filter excess phosphorus out through urine. When kidney function declines, phosphorus builds up in the bloodstream and causes further damage to the kidneys, creating a cycle that speeds up the disease.
Commercial renal diets for dogs are specifically formulated to keep phosphorus low, typically between 0.48 and 1.0 grams per 1,000 calories. For comparison, standard dog food meets AAFCO minimums of 1.4 grams per 1,000 calories, nearly three times the upper end of what a renal diet provides. The International Renal Interest Society (IRIS) publishes stage-specific guidelines for phosphorus targets, and as kidney disease progresses, the allowable phosphorus drops even further.
Bone broth works against this goal. The entire point of simmering bones is to extract minerals from them, and phosphorus is one of the most abundant minerals in bone. The longer the broth cooks, the more phosphorus ends up in the liquid. Even a modest serving of bone broth can contribute a meaningful amount of phosphorus to a dog’s daily intake, potentially pushing them over the tight limits a renal diet is designed to maintain.
Sodium Adds a Second Risk
Dogs with kidney disease are also prone to high blood pressure, which means sodium intake matters. Many store-bought bone broths are loaded with salt, sometimes containing several hundred milligrams of sodium per cup. Even broths labeled “low sodium” can contain more sodium than is ideal for a dog with compromised kidneys.
Excess sodium forces the kidneys to work harder to maintain fluid balance. In a dog whose kidneys are already struggling, this extra workload can worsen fluid retention, increase blood pressure, and contribute to the progression of kidney damage. If you’re considering broth of any kind, the sodium content is just as important to evaluate as the phosphorus.
Store-Bought Broth Has Hidden Dangers
Beyond the mineral content, many commercial bone broths contain ingredients that are outright toxic to dogs. Onion and garlic are common additions, and both belong to the Allium family of plants, which is poisonous to dogs in every form: raw, cooked, dried, or powdered. Garlic is actually the most toxic of the group.
These ingredients damage red blood cells by breaking down their membranes, causing them to rupture. The resulting anemia puts stress on the heart and lungs and, critically for dogs already dealing with kidney disease, the destruction of red blood cells can cause additional kidney damage on its own. Signs include dark or discolored urine, increased thirst, vomiting, and loss of appetite. For a dog whose kidneys are already compromised, even a small amount of onion or garlic exposure compounds the problem significantly.
Other common broth ingredients to watch for include chives, leeks, excessive black pepper, and various seasoning blends that may contain Allium-family powders without clearly listing them on the label.
When Broth Might Have a Limited Role
The one scenario where broth sometimes enters the conversation is when a dog with kidney disease has stopped eating. Appetite loss is common in later stages of the disease, and dehydration makes everything worse. A small amount of homemade, plain broth (no bones, no onion, no garlic, no salt) made from a lean meat like chicken breast can sometimes encourage a dog to drink fluids or eat food they’ve been refusing.
This is a different product from bone broth. A plain meat broth simmered from skinless chicken breast without bones will contain far less phosphorus than a traditional bone broth, though it still isn’t phosphorus-free. Some owners pour a tablespoon or two over prescribed renal food to make it more appealing. This kind of use is about solving a short-term problem (getting calories and fluids into a dog who won’t eat) rather than providing ongoing nutrition.
Even in this limited role, it’s worth checking with your veterinarian first. Depending on your dog’s bloodwork, particularly phosphorus and potassium levels, even a small dietary addition can matter.
Better Alternatives for Hydration and Appetite
If your goal is to keep your dog hydrated or encourage eating, there are safer options than bone broth. Adding warm water to renal kibble softens it and releases aromas that can stimulate appetite. Many veterinary renal diets come in wet formulations that are already high in moisture. Some dogs respond well to slightly warming canned renal food in the microwave for a few seconds to enhance its smell.
For hydration specifically, some veterinarians recommend subcutaneous fluids that you can administer at home. This is a common and effective approach for dogs in later stages of kidney disease, and many owners find it easier than expected once they learn the technique.
If your dog is on a prescription renal diet and doing well, the simplest advice is to avoid adding bone broth or any supplement that hasn’t been cleared by your vet. The formulation of renal diets is carefully balanced, and even well-intentioned additions can disrupt the phosphorus, sodium, and protein ratios that are keeping your dog stable.