Urinary problems are common in cats, and vets often manage them with a change of food. Mera Urinary is a wet veterinary diet made for that purpose, in a 200 g pack. Please buy it on a vet's say-so: the right urinary food depends on what the vet has found.
Feeding and water
Feed it on its own unless your vet has said otherwise, because other foods and treats can work against a urinary diet. The pack lists daily amounts by body weight. Water intake matters for these cats. Put bowls in a few rooms and refresh them daily. Keep the litter tray clean as well, so you can spot changes in how often your cat goes.
After opening
Cover and refrigerate leftovers and use them within a day or two.
We list this with our other cat veterinary diets and with the everyday wet cat food. Clumping litter makes it easier to keep an eye on the tray, and you can find it under litter and trays.