Dead Mouse Smell- How to Get Rid of Dead Mouse Smell

Dead Mouse Smell – How to Identify, Deal and Remove

Is your house stinking? There are times when you must have encountered rodent infestation like mouse or rats. And even after getting rid of them, you may be left with an unpleasant odor. Why the smell of a dead mouse stinks? The odor of a dead mouse is a mix of sulfur dioxides, methane, and other noxious gases. These gases are produced with the decomposition of the tissues. The hell of a smell can be produced by any member of the rodent family such as mice, rats, etc. So, if you are experiencing any such smell in your home, any rodent may have found its way into your place and died.

Both mice and rats prefer small dark places to hide and you can trace them with the help of their droppings. The ideal place for them could be your basement, cupboards, attic or any secluded corners of your home. However, if you did not find any trace and your house is stinking, there may be a dead mouse or rat. As rats are larger than mice, a dead rat may smell worse than a dead mouse. Also, a dead rat may smell for a longer period of time.

So, if a rodent dies in your home, the process to get rid of it can take some time. Let’s dive deep into the dead mouse smell…

How long after death does a Rat start to smell?

The smell from decaying rodent is generated by a combination of chemicals and this may take a few days it starts to stink. Generally, it takes three to five days, depending on if the rodent was injured to dies of old age. The bacteria and enzymes start the process of breaking down the rodent in a few days. The bacteria create an awful smelling gas and therefore as soon as you notice, start looking for the body.

The length of time for the rodent to decompose depends on many factors. The factors may include the size of rodent, injury, age, temperature, humidity, and more. More often, the dead rodents are located within walls, attics, garages, or basements. A professional can help you with identifying and rebuilding the affected area. Even after removal of the source, the house may stink for up to two weeks.

How long does it take for a Rat to decompose?

This may take three weeks or more for a rat to completely decompose. When a rodent dies, it will naturally start to decay. As it decays, it gives off organic compound odorant molecules which lead to stinky smell. The smell may be sight during initial days, but after it starts completely decomposing, the odor can be extremely strong.

In most cases, when you kill rats or mouse with a poison, it solves one problem but leads to another. Another problem is the odor that comes from a dead rodent and it happens when a poisoned rodent can’t be found. They can hide anywhere after tasting the poison such as walls, attics, ceilings and die there.

When a dead mouse or rat starts decaying, the smell will start migrating everywhere. Yes, it’s true that your entire home can become smelly even if there’s one dead rodent.

How to identify a mouse smell?

If you are noticing unusual, ammonia like smell, there may be a dead mouse or rat in your home. Most rodents prefer to keep hidden during the day and search for food from dusk till dawn. Some common signs that you may have rodent in your place include the droppings, grease marks, urine pillars, scratching noises, or strong smell. While the other signs say that you have rodents in your home, the stinky smell means there is a dead rodent somewhere.

As we discussed earlier also that dead mice smell like a mixture of chemicals like sulfur dioxide, methane, and other noxious gases. The smell is produced when tissue begins to decompose and it may take a few days. You can examine the size and shape of any waste you see to identify that if it is a mouse smell. Rat feces are generally three-quarters of an inch long and one-quarter of an inch thick, on the other hand, mice droppings are approximately one-quarter of an inch long with a pointed end.

Rats are bigger than mice; they may smell worse than a dead mouse. But, a single mouse dead body can produce a long-lasting smell. The odor will continue until the body completely decomposes, be it a rat or mouse.How to get rid of dead mouse smell?

How to get rid of dead mouse smell?

Fortunately, it turns out that there are some great ways to reduce the smell caused by decomposed mouse or rats. If you want to get rid of dead mouse smell, follow the following steps…

  1. Find the Source and Remove – The first step should be to find the source of smell or carcass and remove the dead rodent. As long as the dead mouse stays in your home, the smell will only get worse. So, follow your nose and try to dig deep into dark corners. Follow the signs like maggots, flies, etc.


  1. Pick and Dispose Of – Once you find the dead rodent, pick is very carefully with gloves and mask on. Dispose of it in a plastic bag and make sure the bag does not have any holes. A dead rodent carries an array of diseases, so it is important to handle the carcass carefully and clean the contaminated area thoroughly.


  1. Use Smell Removers – There are many smell removers available in the market that you can use to remove the smell of a dead mouse smell. Try to get the smell removers that do not mask it with harmful fragrances. You can also use reusable dead mouse smell removal pouches. These deodorizer pouches absorb the smell and eliminate it.


  1. Rid from Walls – If you have found that the smell is not going from the wall or enclosed space. Drill 3 or 4 holes through the wall one foot above the floor and place smell remover pouches in them. However, you should make sure to plug the holes once you are done. You can also use a fan to draw fresh air into the treated area to get rid of bad odor.


  1. Kill Germs – Dead rodents can carry harmful diseases and it is important to treat the contaminated area carefully. You can use air sanitizers and purifiers to kill and prevent the airborne germs. These products will kill various microorganisms such as mold, bacteria, viruses, and fungi.How to Safely Clean Rat Droppings?

How to remove dead mouse smell?

If you have found the dead rodent and want to remove dead mouse smell completely, the following tips can help:

  • Let Some Air into Your Home – One of the easiest and cost-effective ways to remove dead mouse smell is to let some fresh air migrate. Open all the windows and turn on the fans to let the air circulate even in the darkest corners.


  • Use Deodorizers – After letting the fresh air come into your home, you can use the deodorizers. You can also use candles and sprays to make it a little more bearable. Natural oils and powders are a good way to remove the dead mouse smell.


  • Clean Thoroughly – Hygiene is extremely important and it is a good idea to clean your home thoroughly. You can use specialized cleaners, air purifiers, mopping, or plug-in deodorizers to clean. It will reduce the risk of spreading germs and bacteria.


  • Prevention is Better than Cure – The best way is to prevent the problem from happening because sometimes it may cost you many bucks. If you are using poison of traps, check at regular intervals to remove any mice.

Also, check out the following products that may help:

  • Essentially KateS Peppermint Essential Oil – Peppermint oil is a natural repellent of mice and can be used easily. This oil bottle comes with a long glass dropper and a phenolic cap for long-term storage. It is anti-bacterial, anti-viral and anti-fungal and a natural all purpose cleaner.


  • Stuart Pet Supply Co. – This professional strength and odor eliminator is made to completely remove the odor. It is made with bio-enzymatic formula that works by using natural enzyme bacteria to destroy the odor. This chemical-free product is safe to use around children and pets. It works on wood, tile, marble, concrete, carpet, furniture, clothing, boxes, and more.


There are times when must call for professional help or use high-quality products to get rid of dead mouse smell. If you’re experiencing this problem, it’s time to stay on top of pest and rodent control. Check with your exterminator to discuss how to get rid of the problem and prevent it from happening in future.

Basically, the solution to your problem has two stages – neutralizing the smell of a corpse and gets rid of it completely. You should also use masks and gloves while dealing with any such problems because there can be germs in the air. So be safe and enjoy…