How to eliminate cat urine smell from carpet

Q. My cat peed on the carpet, and it soaked thru to the concrete. The advice I've gotten included dousing the area with a water/bleach combination, "Enzyme D" product, or soaking the area with hydrogen peroxide then painting over it with Kilz oil based primer. Which of these methods, if any, do you recommend? Thanks!!

A. Go to your local pet supply store and ask for a digestive enzyme for pet odors. That will take care of the odor.