The liver, similarly to the kidneys, is responsible for removing toxins from the body and helping it to digest food. Infections and diseases of the liver can produce high levels of ammonia in the urine and the accompanying pungent odor.
I have put together a list of the carpet cleaning machines that offers the best systems to  remove pet odour, handles very tough stains and has great features  that really help when you are cleaning up after your pet.
Pictured above is the brilliant gadget that will detect dried urine and those stains you just cannot see! It is an LED/UV Cat-Dog-Pet Urine Stain Blacklight Flashlight and is available at a big discount from Amazon.
As for the cons, I like many others wish it had another 5 feet of cord as I have a large open floor plan in my home. If you have more of a traditional type of home this will probably not be an issue for you as you will not need more cord length.
Soak up as much of the urine as possible: Place a thick layer of paper towels on the wet spot, and cover that with a thick layer of newspaper. If possible, put newspaper under the soiled area as well. Stand on this padding for about a minute, and repeat until the area is barely damp.
Use an air purifier. Trap stinky dander, fur, and other odor sources with an air purifier equipped with a HEPA filter. If you have allergies, this solution is doubly awesome, because these filters reduce dust and other allergens in the air.
I would like to thank you for this amazing remedy! I have two male dogs that were having a marking war in my living room and I like everyone else here had used countless products to get rid of the smell to no avail. The final straw was today when I cleaned my carpets and could smell nothing but the urine smell in that area. Then I looked up “natural home remedies for pet stains” and came up with your website. The solution of peroxide and dish detergent on top of the baking soda hasn’t even dried yet and my house smells WONDERFUL again. I will no longer be embarrassed to have people over to hang out!!
This is amazing! I felt like I had tried everything (including buying a steam cleaner) and not one thing I tried worked! Thank you so much for sharing! I was going crazy with the smell of Dog Urine Read all Testimonials
Cats love to rub their smell on the corners of couches, chairs, tables, walls, doors, fridges, bench bases, or anything else they can potentially mark with their scent glands (ever see your cat rubbing their face on your legs?). Try wiping furniture with vinegar and washing all curtains, too.
If you have a puppy, an elderly dog, or a dog still mastering their potty training skills, you’ve dealt with pee in the house. Depending on what surface they go on, and how long it sits before you find it, that stubborn dog pee smell can really stick around! But it doesn’t have to.
There is one flaw, however, which is that the same citrus smell that discourages your pets from reusing the area is created by orange oil. This is terrible for any kind of hardwood flooring and it’s not worth the risk as it can strip the finish.
Well, my puppy started pottying on my new carpet after a few months, for some reason. I clean the spots by first soaking it all up with paper towels, then using OUT. I also used my carpet cleaner machine. However, I went back with the black light and the spots are still showing up just as bright. I’m sick. What to do?
Oh and by the way, in case you are one of the many people who walk into a room and ask,”can you smell something?”, when you know your dog or cat has peed but it’s already dried and there is nothing left but the odor – I am going to reveal how you can find the offending area of carpet or upholstery in seconds and get it dealt with, right away!
Bubba’s knows that our pets sometimes get in trouble, you know? And they’ve made this cleaner specifically to help you out when that stain and odor hits the floor. It’s even supposed to work with that worst of smells… cat urine.
1. Heavy. I know. I just said in #4 above that it was great it was heavy and don’t get me wrong, it is great and I wouldn’t change that fact, but that is just a con for some people who can’t do “heavy” for medical / physical reasons and I get that. I like the dry carpet more than I need a lightweight cleaner. Heavy duty motor sucks the water out, lightweight motor? Not so much. I had another Bissell about 13 years ago and it didn’t work worth a hoot. Ended up in the dumpster after a year. If weight is an issue for you, you may want to think about it.
Find previously soiled areas using a black light. If you have a persistent odor problem in a particular room, use a black light to illuminate all surfaces in the room. Urine will glow under black light, and once detected can be cleaned.
Enzymes are protein that help break up urine molecules and dissolve odors. Enzyme cleansers work, but they can take some time. You’ll spray or blot the area with cleaner, then let it sit for a while before blotting it up and scrubbing the spot. You may need to repeat this process.
Use only 3% Hydrogen Peroxide. Do not use Hydrogen Peroxide that is higher in concentrate than 3%  Bleaching may occur on some carpets with a stronger solution. Read the label on the Hydrogen Peroxide carefully. The label will state the strength.

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Liver trouble can also result in urine that is musty smelling.14 Because your liver needs to break down urea in the body, if it malfunctions it causes excess buildup of ammonia. The ammonia passes out through your urine, causing that trademark foul smelling pee.15
The leading store-bought products made for removing the stain and smell of pet urine from carpets use the power of enzymes to do the work and are non-toxic for pets. Enzymes are proteins that help kick off natural chemical reactions at the molecular level, and the enzymes in pet carpet care products attach themselves to the molecules that make up the urine and bacteria that feed on it (producing the foul odors) and catalyze their breakdown.
I​’m interested in the intersection between design and technology​—whether for ​drywall or robotic vacuums—and how the resulting combination affects consumers. I’ve written about consumer advocacy issues for publications like The Atlantic, PC Magazine, and Popular Science, and now I’m happy to be tackling the topic for CR. For updates, feel free to follow me on Twitter (@haniyarae). 
My husband and I were thinking about taking him to ‘doggy school’, but then again, it’s extremely expensive, and the nearest ‘doggy school’ is far away from us. Maybe you have some advice? THANK YOU!!!!
Your kidneys serve to filter excess water and water-soluble wastes out of your blood, getting rid of toxins and things that would otherwise build up and cause you to become ill. Many things — from excess protein and sugar to bacteria and yeast — may make their way into your urine.
My cat peed on our couch while we were away even though we had a cat sitter. I tried the baking soda & vinegar solution with directons #2 and the smell is GONE! I’m so happy – the next test will be if cats do it again on our next trip! But at least we have something to clean it up with!
Some pets hate the smell of vinegar, even after it is has dried. Vinegar can also help to mask odor for your own nose, so a few drops of this over the affected area may help to deter future use by the pet.