Anyone who owns a cat knows that urine stains and odors can be a problem. Eliminating cat urine stains and odor can be especially difficult because cat diets are so much richer in protein than dog diets and therefore produce harsher odors and are more likely to cause stains. Selecting a product for odor removal is simple. Odor exterminating candles not only neutralize odors, but they come in a variety of different scents and last for hours. There are also solid pet deodorizers that eliminate odors as they evaporate and last as long as four weeks.