My Pete is one of those cats that blocks for no reason. My vet told me that 30% of all male cats will have some kind of urinary tract problem in their lives. Of that 30%, 80% will only block once and that's the end of it, another 15% will block a few times and get infections, the last 5% block for no reason and nothing stops it....That's my Pete... No infection, no stones, no crystals. Just blocks all the time.

He's had the PU surgery so he's fine now. But the surgery doesn't correct the underlying problem, only prevents the blockages. So Pete still sometimes has a flare-up and starts peeing all over the place. He does eat prescription food (c/d) and gets some supplements (cranberry extract) and all the water I can convince him to drink.

My vet has told me that when cats get sick as young as Pete did (2), they sometimes outgrow the problem. The PU surgery was needed to keep Pete alive. His flare-ups do seem to be getting farther apart and I'm hopeful that someday he'll be done with them all!