How long does dead rat smell last?

Author: Mrs. Elinor Bailey III  |  Last update: Monday, February 16, 2026

On average, a rat takes roughly 2-3 weeks to decompose; however, lower temperatures will increase this time period significantly. Once the body has decomposed, the smell won't instantly leave your home. Instead, the foul smell will still be lingering in your home roughly two weeks later.

Will a dead rat eventually stop smelling?

Dead animals will smell until they are entirely decomposed or dried out. The damper the site, the longer the odor will last. For example, if a rat dies near a steam pipe, the smell can be horrible for weeks, but the odor from a dead mouse may last only a day.

Is it okay to leave a dead mouse in the wall?

A dead mouse should not be left to rot inside your wall, because its corpse could soon attract fleas. With an electronic borescope, you can locate the corpse's whereabouts by drilling a coin-sized hole, a few inches off the ground, into the drywall of the cavity that seems to be emitting the smell.

Do dead rats attract other rats?

If you can face it, smear the dead rat around the inside of the trap box, or leave the dead animal nearby. Rats are attracted by other dead rats.

What are the stages of dead rat smell in the house?

At first it may have a slightly sweet scent, but then as the days go on, it really begins to smell rancid, bright, and sour. The good news is that if you smell a decaying rodent, it is likely just the one, as rodents will absolutely cannabalize each other and not leave much behind that would cause an odor.

How to get rid of dead rat smell?

How do you get dead rat smell out of your house?

To eliminate the dead animal smell, open the windows and doors to let in the fresh air. You can also turn on fans to help circulate the air. Next, you will need to thoroughly clean and disinfect any areas where the animal's dead body was located.

How long does it take for a dead rat to get maggots?

The female lays her eggs on or near a decomposing animal, and the eggs hatch within 8-20 hours into larvae, also known as maggots. Maggots are legless and worm-like, with a moist, translucent appearance.

Will a rat eat another rat if it's dead?

Denied food, rats will turn to killing and eating each other, further reducing the infestation. Rats cannot live without food, water, or shelter.

What to do if you find a dead rat in your house?

Handling a dead rat can expose you to harmful pathogens. To protect your health, contacting a professional dead rodent removal service is strongly recommended.

Will rats leave if they smell a cat?

Do cats keep mice and rats out of your house? The short answer is, yes – cats are highly effective deterrents in the areas of the home that they can reach, even if they're not really 'mousers'. Rodents do not like the smell of cats, one of their natural predators, and will avoid being caught in the open.

How do exterminators get rid of rats in walls?

Pest control professionals typically use a combination of methods to address rats in floorboards and walls, even if they haven't come out. This includes baiting, trapping, and sealing entry points. Bait stations with poison are often placed strategically to attract rats inside the walls or floorboards.

How long does it take for a dead mouse in a wall to stop smelling?

Unfortunately it may take three weeks or more to completely decompose. A professional may be contacted to break through and rebuild affected walls. This can be costly and not a viable option. Even after elimination of the source of dead rodent smell, the unsettling scent may linger for up to two weeks.

What do mice hate the most?

13 scents that mice hate and can help you to keep them away
  • Cinnamon. This has a strong and spicy aroma that mice probably hate. ...
  • Vinegar. Mix some water and vinegar in a spray bottle to mist any areas where they have been seen more often.
  • Dryer sheets. ...
  • Cloves/clove oil. ...
  • Peppermint oil. ...
  • Teabags. ...
  • Mint toothpaste. ...
  • Ammonia.

How long can a rat live trapped in a wall?

Any remaining rats inside the walls of your home will get hungry and thirsty since we have blocked all entry & exits. Rats can only survive within 5 to 7 days without food or water. Removing the walls is just a matter of a few days.

What to do if you can smell a dead mouse but can't find it?

If there's no evidence to point you in the direction of an impromptu mouse graveyard, follow your nose to the most concentrated area of the stench. If there's still no sign of the corpse, it could possibly be in an air duct, a wall cavity, the attic, the crawlspace or in the sealed underside of a kitchen counter.

What does it mean to see a dead rat?

Encountering a dead rat could signify the end of a certain phase or aspect of your life, paving the way for new beginnings and opportunities. Just as the rat has passed away, so too may something in your life be coming to a close, making room for growth and transformation.

Does the smell of a dead rat go away?

It may take days or weeks for the carcass to dry out and the odor to naturally and completely disappear. Humidity can affect the process and make the nauseating odor even more intense. So, if a rat dies near steam pipes or other moist areas in your home or car, it may be "ripe" for a long time.

Will rats leave if there is no food?

Rats will not leave on their own unless they are forced to do so by humans. If you give them a chance to leave on their own they will eventually die from lack of food or water or because of disease or other circumstances that could kill them off quickly before you get rid of them completely.

How do you clean after finding a dead rat?

Clean up dead rodents or nests
  1. Step 1: Wear rubber or plastic gloves.
  2. Step 2: Spray the dead rodent, nest, and surrounding area with a disinfectant. ...
  3. Step 3: Place the dead rodent or nesting materials in a plastic bag along with any used traps. ...
  4. Step 4: Tie the ends of the bag together in a knot to seal the bag.

Do rats cry when another rat dies?

Rats can experience grief after the death of a companion just as humans can. Although rats may not have the intellectual ability to rationalize such a loss, it is clear that they recognize their companion is gone and they can show many of the same physical manifestations that we feel.

Where do rats go during the day?

Inside, rats can be found hiding out in holes, cracks, and crevices; climbing up through drains in bathrooms and kitchens; behind cabinets; behind and under appliances; in air ducts and ventilation systems; in piles of clutter; in storage containers; in hollow walls; and in crawlspaces, attics, garages, and basements.

What happens if you leave a dead rat in your house?

The smell of a dead rat can be harmful to a person's health due to the toxic gases and microscopic compounds of the dead animal that are constantly being released into the indoor air. Since most homes are not consistently ventilated, the gases permeate into the respiratory tract and can potentially cause illness.

Can you get sick from breathing in dead animal smell?

The smells coming from a dead animal are unpleasant, and they can often make you feel like you are going to be sick. However, simply smelling a dead animal is not likely to affect your health.

What does a rat infestation smell like?

This smell is often described as musky and ammonia-like, similar to the odor of urine, because rats tend to urinate frequently to mark their territory. The intensity of the smell can vary depending on the size of the rat population and how long they've been present.

What to do with a dead rat?

They can be disposed of by double-bagging (carrier or bin bags) and putting in your household rubbish bin. It is advisable to wear gloves and/or use a spade to lift a dead rat into the bag.

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