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Question:

Difference between Hill's c/d and Royal Canin SO?

I really need some advice about my cat’s diet. I’m feeling pretty overwhelmed and could use some help. My vet recently told me that my cat, Bella, needs to switch to a urinary care diet, and they recommended either Hill’s c/d or Royal Canin SO. I’ve done some research, but the more I read, the more confused I get. They seem similar, but I just don’t know which one would be better for her. Bella is my baby, and I want to make sure she’s on the right food for her health issues. Has anyone here had experience with either of these brands? Did one work better than the other in your experience? I’d appreciate any insights or personal stories you could share. Thanks so much for taking the time to read this and help out!

Answer:

Hi there! It’s great that you’re being proactive about understanding the differences between Hill's c/d and Royal Canin SO, both of which are specially formulated diets to support urinary health in pets. The main distinction lies in how they manage urinary issues, such as struvite stones or urinary tract conditions.

Hill's c/d is designed to create a urinary environment that reduces the risk of stone formation through controlled levels of magnesium, calcium, and phosphorus. It also helps to dissolve existing struvite stones while maintaining healthy urinary pH levels.

Royal Canin SO, on the other hand, works by promoting increased urine production to help dilute the minerals that form stones. It targets both struvite and calcium oxalate crystals and is often used to prevent recurrence.

At home, ensure plenty of fresh water is available to encourage hydration, which is crucial for urinary health. However, if your pet is having frequent urinary accidents, difficulty urinating, or you notice blood in their urine, these could be signs of a more serious issue that requires immediate veterinary attention.

If you’re unsure which diet is best for your pet's specific needs, or if you're noticing any concerning symptoms, I recommend booking a video consult with one of our Dial A Vet specialists. They can provide personalized advice specific to your furry friend’s condition.

Answered by

Louise - Senior Veterinary Nurse, Dial A Vet

June 17, 2025

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The "Ask a Vet" forum on Dial A Vet offers general information and helpful tips on pet health, but it's not a substitute for professional veterinary care. The advice here doesn't create a veterinarian-client-patient relationship, and our vets can't diagnose or treat your pet remotely. For emergencies or specific medical concerns, always contact your local veterinarian immediately. Your pet's health is unique, and decisions should only be made after consulting with a qualified professional. By using this forum, you acknowledge these limitations and agree to seek in-person veterinary advice for all your pet's health needs. View our content guidelines.
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