This is a specific conversation about Cat urinary problems — diet and products that help — ask about yours and get one honest answer for your exact situation.
inparticular.ai
An overweight male cat with a history of urinary crystals is a combination that really does need a careful, joined-up approach to diet — excess weight slows activity and reduces water intake, both of which make crystal formation more likely. Urinary issues in male cats always need to be taken seriously given the risk of blockages. Has he been seen by a vet recently about either the crystals or his weight, and what are you currently feeding him?
He saw the vet about 6 months ago after straining to urinate — they found struvite crystals and put him on a urinary diet for a while, but I've drifted back to his regular food. He's a British Shorthair, 8 years old, 7kg. Vet said he should be around 5.5kg.
inparticular.ai
That's a really common pattern — the urinary diet does its job, things settle down, and it feels okay to go back to normal food. But with struvite crystals and his weight, he genuinely needs both problems addressed at the same time, and a standard food won't do that. The good news is there's a product designed exactly for this overlap. Can I ask — is he eating wet food, dry, or a mix? And do you know if your vet specified struvite only, or mentioned oxalate crystals at all?
He was on wet food during the treatment and seemed to like it. Vet just said struvite. He's been on dry food since we stopped the prescription diet, which I know probably isn't helping with hydration.
inparticular.ai
You're right that dry food is a real problem here — cats with crystal history need high moisture intake to keep urine dilute, and most cats won't compensate by drinking more water. Going back to wet food is the single most impactful change you can make. For his specific situation — struvite history plus needing to lose around 1.5kg — I'd recommend Royal Canin Urinary S/O Moderate Calorie wet food in pouches. It's formulated to dissolve struvite crystals and reduce recurrence by targeting urine pH and reducing mineral concentrations, but the moderate calorie version is specifically designed for cats who also need to manage their weight. It's not a prescription diet, so you can buy it directly, and it comes in a texture most British Shorthairs do well with. One pouch per meal, two to three times a day depending on target weight — the pack has a feeding guide based on ideal rather than current weight, which is how you'd use it for weight loss.
That sounds ideal actually. Is it something I can just switch to straight away, or do I need to transition him slowly?
inparticular.ai
Transition slowly — about 7 to 10 days mixing increasing amounts of the new food with his current food. Cats with urinary issues can be prone to stress-related flare-ups, and a sudden food change can occasionally trigger symptoms even when the new food is better for them. Mix roughly 25% new to 75% old for the first few days, then 50/50, then 75/25, then fully across. Given he's already had one episode, it's worth being patient with the switch. And it would be worth a vet weight check in 8 to 12 weeks once he's settled on the new food — partly to track the weight loss, and partly so they can confirm his urine is staying in a healthy range.
Great, thank you — that's really clear. I'll order it today.
inparticular.ai
Good — you're making the right call getting back on top of it before he has another episode. The weight loss will take a few months but the urinary protection kicks in much faster than that. Keep an eye out for any straining, crying in the litter tray, or blood in urine — those mean a same-day vet call for a male cat. Good luck with him.
