Should senior cat food have less protein for kidney health?

As long as your cat is eating a diet that has undergone feeding trials or is formulated to meet AAFCO standards and is eating an amount of food in the range recommended in the feeding directions on the label for his weight, then he is likely getting enough protein. As long as he does not have any underlying liver and/or kidney problems it does not matter how much protein you feed him. Please know that feeding a diet that is higher in protein than cats need does not result in any health benefits. For a healthy cat, excess protein is unlikely to be harmful, either. The extra protein will just be broken down by the body and eliminated in the urine.

Yes, it is ok to eat renal food, but only as a treat or supplement to the main diet of Hills Rx Senior. Renal food is lower in protein than normal cat food since the kidneys can't handle excess protein when they are failing. So it would be best for long-term health if Tony gets plenty of protein, which is in the senior diet!

Royal Canin carries a diet called Senior Consult which has restricted Phos but not as low as the renal diets so it is not appropriate to feed instead of the renal diets. I recommend to discuss this option with your vet before making any diet changes since they are the most familiar with Tony's history. You may ask your vet about an appetite stimulant such as mirtazapine. Many renal cats want variety. Many owners will keep several renal food options and will switch the kibble every week to keep it interesting. Most cats will go back to eating a diet that they had previously stopped eating so you may try circling back. You should also ask about the return policy when purchasing the food in case Tony won't eat the food. I hope this helps and please feel free to post any additional questions.

John, I'm sorry to hear of the mild kidney problem with Dusty and Stitch. There are several excellent prescription cat foods that are for kidney support. I would start with the brand your veterinarian recommends. If they don't like it try another until you find what they like. Your veterinarian will recommend periodic blood tests to monitor their kidney function and will add medication or fluids if that becomes necessary. Many cats live long active lives even with some kidney issues so with good care they should be fine for several years or more.

Great question! One of the benefits of Royal Canin aging 12+ is that helps support renal health by having reduced phosphorus. It doesn't say if it's lower in sodium, but it is an excellent food for older cats and has the reduced phosphorus which is important given the prevalence of kidney disease in older cats. I recommend it as a food option for Tony. I hope this helps!

The challenge with chronic kidney disease is that it's often necessary to limit protein intake, but they can be a bit nauseous if their kidney values (BUN and creatinine) are high. Some cats also require supplements of potassium to help keep their electrolytes under control. I don't know specifically what you have available in Brazil with respect to prescription diets, but I usually prescribe either Hill's Science Diet k/d, Purina NF, or Royal Canin renal support. I would start by asking your vet if you could try one of those diets for Sophia - possibly mixed with the A/D to help make it more palatable to her. Ultimately, when it comes to managing cats with kidney disease, it's more important to get them to eat something - anything - over nothing. If you try all of the renal diets and Sophia rejects them all, I would next try any other canned commercial cat food. If she also rejects those, you'll just have to give in and go with the higher protein fish option, such as cooked fresh tuna or salmon. It's not ideal, but what in life is? I hope that everything goes well for Sophia!

Prescription kidney diets have proven to improve both quality and length of life in pets with poor kidney function. They are formulated to reduce the amount of work required for the kidneys by reducing the amount of waste products produced from food as well as containing tightly balanced mineral, vitamin, omega fatty acid and protein levels and work best in wet forms or where good water intake can be encouraged. The larger proportion of the diet the better, any additional food sources should be highly digestible and suitable for pets in kidney failure, blood tests would be recommended 3-4 weeks after any diet changes to ensure no negative impacts develop