If you have a little bit of odor you might be able to get by with just your basic carpet cleaning. This can be effective if the pet urine is in the surface fibers of the carpet. Call a professional to clean your carpet to see if it helps before going any further. If you still have pet odor you will need to go one step further. Stubborn odors are usually caused by urine that has gotten into the padding and sub floor. To take care of these odors you must pull up the carpet and remove the affected pad. Padding can not be cleaned well and is inexpensive enough that it should just be replaces. After you remove the pad you will need to clean the sub floor using a mixture of one part vinegar to two parts water. Next you will let the floor dry and then apply a sealant such as a shellac to seal in an odor. Lastly you will need to put the new pad in place and reinstall the carpeting after you have cleaned the backing of the carpet. That's it you are done and are hopefully odor free.

This might sound like a lot of work but it is the only way to truly get rid of pet odor. If you don't think you can get it done you should call a professional in to do the work. Most carpet cleaners can handle it. Good luck.