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
Urinary issues in cats are worth taking seriously — particularly in male cats, where a blockage can become life-threatening within hours. Diet is one of the most powerful tools for managing and preventing problems, but it needs to work around any existing allergies too. Before I point you in the right direction: is your cat currently showing symptoms, has he seen a vet about this, and what's he eating at the moment?
He's a 5-year-old male DSH. He had a blockage about eight months ago, was treated at the vet, and they recommended a urinary diet. Problem is he's also allergic to chicken and most of the urinary foods seem to be poultry-based. He's currently on a prescription urinary food but it contains chicken and he's been scratching and having loose stools ever since.
inparticular.ai
That's a really frustrating combination — urinary diets genuinely help, but if the protein source is triggering an allergic reaction, you're trading one problem for another. The scratching and GI upset are classic signs his immune system is reacting to the chicken. I want to make sure I understand the full picture: is the allergy confirmed chicken specifically, or does he react to poultry broadly — turkey and duck as well?
The vet did an elimination trial and it was confirmed as chicken. He seems okay with fish, and we haven't tested turkey or duck but I'd rather avoid all poultry to be safe.
inparticular.ai
That's sensible, and fish as a confirmed safe protein makes this much more straightforward. For a male cat with a blockage history and a confirmed chicken allergy, I'd go with Royal Canin Veterinary Diet Urinary S/O — specifically the fish flavour in pouches. It's formulated to dissolve struvite crystals, acidify urine, and increase water intake through wet food — all critical after a blockage — and the fish version avoids all poultry entirely. It's a prescription diet, so your vet will need to authorise it, but given he's already been prescribed urinary food they should be happy to switch him to the fish variant. You can get it on Amazon UK, though your vet or Viovet often have it at a better price per pouch.
Is wet food essential, or could I do a mix of wet and dry? He actually prefers dry food.
inparticular.ai
Wet food is strongly preferred for urinary cats because hydration is a core part of the treatment — dry food, even the best urinary dry food, simply doesn't get enough water into them. That said, a 75/25 wet-to-dry split is much better than all dry, and Royal Canin does make a dry Urinary S/O as well. If you go that route, check the ingredients on the dry version — the standard one contains poultry hydrolysate, which I'd want to flag to your vet given his allergy history. The wet fish pouches are the cleaner, safer choice for him. Push him toward wet where you can — even adding warm water to soften it can help if he's resistant.
That's really helpful. I'll speak to the vet about switching to the fish pouches. Is there anything else I should watch for going forward?
inparticular.ai
Yes — a few things worth keeping in mind. Straining in the litter box, crying when urinating, or producing no urine at all are emergency signs in a male cat; don't wait on those. For ongoing management, multiple water sources around the house and a water fountain can make a real difference to intake. Keep litter boxes clean and low-stress — urinary problems in cats are often made worse by anxiety. And do schedule a follow-up urine check with your vet around 4–6 weeks after switching food to confirm the crystals are responding. He's already had one blockage, so you're right to stay on top of it.
