Bleach will often lighten the stains but does not react with the urea salt. Mixing bleach and ammonia, even in small quantities, produces free chlorine gas that can and will severely burn your eyes, nose and lungs. Mixing chlorine bleach with fresh urine can be very dangerous because as the urine dries it gives off ammonia gas which when mixed with bleach releases chlorine gas. Enzyme products produce small amounts of ammonia gas as a byproduct of their reaction with urea salt. If there is any bleach in the area, the reaction will be the same.
Some other notes on using bleach. Bleach is formulated to clean and whiten clothing. In order to attain that goal, many other chemicals are added. Eliminating urine odor is not among the goals. If you are using the bleach for a disinfectant, you would be far better off to use swimming pool liquid chlorine shock. It is much more concentrated, and is not mixed with chemicals for laundry use.
Finally, do not use OdorXit Concentrate
in combination with chlorine or oxygen based bleach products. They both oxidize the organic salts and oils in OdorXit, making them ineffective.