Enzyme cleaner for Devon Rex territorial spraying

Territorial spraying from an intact or anxious cat like your Devon Rex is one of the trickiest odour problems to solve — and the only products that permanently eliminate pet odours are enzyme-based cleaners. Everything else, sprays, steam, baking soda, just masks the smell temporarily, and because cats navigate by scent, your Devon Rex will return to exactly the same spots unless the uric acid crystals are fully broken down at a molecular level. To recommend the right product and approach, it helps to know: which surfaces has he been spraying — carpet, hard floor, sofa, curtains? And has your vet confirmed this is purely behavioural spraying, or is there also a medical component being treated?

That's exactly the right sequence — the behaviourist work won't stick unless you remove the scent map he's built up over years, because as far as he's concerned those marks are load-bearing. Carpet along skirting boards and sofa bases are the worst combination for this because both absorb urine deeply and the sofa foam in particular holds odour long after the surface looks clean. Which surfaces are we dealing with in terms of carpet — do you know if it's fitted carpet with underlay, or a rug you can lift?

For a whole-home reset with set-in stains on fitted carpet with underlay, I'd recommend Simple Solution Extreme Pet Stain and Odour Remover. It's a professional-strength enzyme formula, widely recommended by vets and behaviourists specifically for this kind of scenario, and it comes in a 4-litre or larger trade size which you'll need for a ground-floor sweep. The key with set-in stains on fitted carpet is saturation — the enzyme solution needs to reach the underlay where the uric acid has settled, so you're applying generously, covering with a damp towel and letting it dwell for 10 to 15 minutes rather than blotting immediately. For the sofa, use the same product but apply to the fabric and the seam lines at the base, which is where spray travels. You'll likely need two passes on the oldest spots. Simple Solution Extreme is available on Amazon UK in 4-litre bottles — that's the size to go for given the scale of what you're tackling.

Yes, absolutely — and this is the part most people skip. Get a UV blacklight torch (they're cheap on Amazon, under a fiver) and do the whole ground floor in the dark. Cat urine fluoresces bright yellow-green under UV, and you'll almost certainly find marks you didn't know existed. Treat every single one. The behaviourist will tell you the same thing: your Devon Rex has a mental map of every spray site, even old faint ones, and he'll use them as anchors unless they're gone. Do the full sweep before his first behaviourist session so you're genuinely starting clean.

Two things to avoid: bleach and any ammonia-based cleaner. Bleach doesn't destroy uric acid and is actually mildly attractive to cats because the smell has a faint similarity to urine — counterproductive for obvious reasons. Ammonia is worse, it mimics the scent of urine directly. Also avoid using the enzyme cleaner at the same time as a disinfectant spray — disinfectants kill the active enzymes before they've done their job. Apply Simple Solution Extreme, let it fully dry, and only then use any other cleaning product if needed. One other note: Devon Rex coats are very fine and they groom constantly, so make sure any treated surface is fully dry before he has access to it.