Pets can on occasion be inclined to urinate on indoor carpets. Both kittens and puppies, even fully grown cats and dogs can make a mess. Although this isn't a usual practice for one reason or another it can happen and it is imperative that the odour be removed promptly and effectively to ensure the process isn't repeated or become habit.
Urine contains substantial quanities of ammonia which is responsible for that strong pungent odour. Bad Kitty has the natural and unique affinity for ammonia and will adsorb and lock it up to remove the possibility of smell.
Having discovered the accident, roll up the carpet and sprinkle Bad Kitty powder both under and over the carpet liberally. The powder will soak up the liquid and draw it out of the carpet and backing. Allow to dry and vacuum up. Reapply if necessary.
The reason it works so well is that this powder has a structure designed for attracting and hold compounds such as oil and being milled to such a fine powder can penetrate the fine pores of the concrete where the oil residue is held. This is no ordinary sand or talcum powder, this is the power of zeolite at work.