Leather is a natural, porous fiber that tends to absorb stains and odors. If your cat has urinated in your leather shoes you can remove the stains and odors using supplies found in the home. The quicker you can tend to the urine-stained shoes, the less time the urine will have to be absorbed into the leather. Once you remove the odor, you'll be able to enjoy wearing your leather shoes again.
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Place newspaper down on your work surface to keep it clean. Place your leather shoes on top of the newspaper.
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Sprinkle baking soda, liberally, all over the inside and on the uppers of your leather shoes. Allow the baking soda to sit on and in the shoes for at least a few hours, and then use a vacuum to remove the baking soda.
Mix one part white vinegar with two parts warm water and a few drops of scented mouthwash.
Apply this to any area of your leather shoes still smelling of cat urine. Rub the solution into the pores of the leather using an old toothbrush or cleaning cloth.
Rinse the area with a clean cloth dampened in plain water.
Dry the shoes with a clean cloth, then allow them to finish drying in a well-ventilated location. Placing them outdoors, if possible, is best.
Condition the leather of your shoes using a leather conditioner. Follow the directions on the bottle.