How can I effectively remove dog urine odor from carpet padding?

To effectively remove dog urine odor from carpet padding, start by blotting up as much urine as possible with paper towels. Then, mix a solution of equal parts water and white vinegar and pour it over the affected area. Let it sit for about 10-15 minutes before blotting it up with more paper towels. Finally, sprinkle baking soda over the area and let it sit overnight before vacuuming it up the next day. Repeat these steps if necessary until the odor is gone.