I have three males in my household and the only one with a problem was Smokey. Smokey ended up with surgery to make the urethea bigger so the stones/crystals don't end up blocking him.

Tiki may never develop a problem but here are a few things to look for in case he does.

Look for straining to go the bathroom. When Smokey was not feeling well and was starting to develop a problem he used to put his rear end straight up in the air and try to go the bathroom. He also used to get the urge to go and would pee in where ever he was.

If you are looking for a diet that may help to prevent the stones/crystals you need to read the cat food labels. When it comes to wet canned food look for an ash content that is low. I'm sorry but I don't remember the exact levels that I used to look for but compare a few labels and try to go with the ones that are less. Fish type cat food is generally higher in ash but you can find canned cat food that is fish flavored that is low in ash.

If Tiki should develop a problem I would recommend asking your vet about Methio-Form. It is a food supplement that you crush up and put into the wet food that helps break down the stones/crystals. I always keep it on hand in case Smokey gets a reoccurance.

Hope some of this info helps.