PLEASE check with your vet.your cat may have a u. Cat urine is one of the strongest & most tenacious smells there is. If a cat pees, it's nearly impossible to get the smell out. Instead, here's how to stop your cat from peeing in your house.
How To Remove Cat Urine (AND The Smell!) From Carpets
Remove pet accidents from carpet: Mix 1 part water, and 3 parts vinegar. Let it soak for 30 minutes. Mix 1 cup of hydrogen peroxide, 2 teaspoons of baking soda, and a squirt of dish-washing liquid. Shake it well. Spray, and let it soak/dry.