Matt Johnson

Rodent Problem? Kill Mice with Salt

Author: Matt JohnsonPhotos/Graphics: Mike HawthornePublished: Jan 10, 2023Updated: Jan 6, 2024

Are you having problems with mice in your home or travel trailer? If so, it’s time to take action and eliminate them. One way to do this is to kill mice with salt. That’s right. Sodium chloride, better known by the masses as salt, can kill rats and mice almost like a natural pest control or poison.

Salt has long been used as a natural rodent repellent and can be an effective way to get rid of unwanted guests without the use of harsh mice poison or traps.

Salt is a natural rat poison.

Whether you have house mice or rats, you probably want to get rid of them quickly. Traditional traps and poisons can be dangerous to you, your pets, and the environment if not used correctly. Instead of using these methods, many people have turned to salt as a natural mouse poison.

Salt is an effective way to kill mice because it acts like a dehydrating agent on the rodents. We’ll get into how it works shortly, but just know that you can kill rats and mice with salt.

That’s right, good ‘ol table salt. You probably have a container of it in your cabinet.

How too much salt can kill mice.

Salt can kill mice by causing them to become dehydrated. This is because salt absorbs the moisture from their body when they eat it, leading to death by dehydration.

It’s important to note that mice can’t vomit, so once they’ve ingested a deadly dose of salt, there’s no way for them to get rid of it.

Mice naturally need around 80 grams of salt per day. That’s not a whole lot for larger animals such as dogs or cats, so it’s easy to overdose a mouse with salt. Eating too much salt can cause organ failure, seizures, and eventually death.

Ways to use salt as a pest control.

We’ve established that salt can be used to kill mice, but how exactly do you use it? Here are a few ways to use salt as a natural mouse poison:

  • Raw salt. Sprinkle salt directly on the floor or other surfaces. You can sprinkle it in areas where you’ve seen rodents, such as around baseboards and in corners. They’ll consume it as they go about their daily activities. The downside to this is it is messy.
  • Mix salt with another food source. Mix salt with food like peanut butter, cheese, or any other food in their preferred diet, and place the mixture in areas frequented by mice. Since wild mice eat salty snacks and other food sources, they’ll be sure to find them and eat it. You can make salt bars with just 80 grams of salt, 120 grams of peanut butter, 1 egg, and 3.6 kilograms of bird or pet food. Mix all the ingredients until a dough-like consistency is achieved, and roll it out on parchment paper to make a bar about half an inch thick. Then cut it into small cubes and place it around your camper or home.
  • Combine salt with glue traps. This is one of the most effective methods for killing mice with salt. Place a glue trap in areas where you find evidence of mice, then sprinkle the trap with salt. The salt will draw in the mice and cause them to get stuck in the glue. Be sure to check your glue traps from time to time otherwise you’ll have a dead mouse and some foul smells.

No matter which method you choose, make sure to use enough salt so that it’s effective and they don’t survive. If using raw salt or a food mix, you should use at least one tablespoon per square foot.

Salt is a natural and humane way to deal with rodents in your home or garden. It’s safe for humans and pets, and it’s effective enough to get rid of mice quickly. With the right methods, you can kill mice with salt and reclaim your space from pesky intruders.

Killing mice vs capturing mice.

Mouse Caught in Mouse Trap

Why wouldn’t you want to just capture the mice and release them elsewhere? The truth is, this isn’t always the best option.

MethodKilling Mice with SaltCapturing Mice
ApproachUtilizes salt as a natural rodent poison to dehydrate and kill mice.Involves using traps to capture mice alive without killing them.
EffectivenessSalt causes dehydration in mice, leading to death. Effective if mice consume enough salt.Varies based on the type of trap used; can be effective if properly placed and baited.
SafetySafe for humans and pets, as it doesn’t involve toxic chemicals.Generally safe, especially if non-toxic baits are used.
Environmental ImpactNon-toxic and doesn’t contaminate the environment like chemical poisons.Considered humane and environmentally friendly.
Ease of UseRequires preparation of salt mixtures or placement of salt in strategic locations.Requires setting up and monitoring traps, and dealing with live mice after capture.

Mice can carry diseases and cause damage to your home or property. Letting them go may simply relocate the problem instead of solving it for good. They will be back!

If you’re worried about your camper or RV in storage then you might not be around to deal with any more mice that come into your space. In this case, killing them may be the only option to prevent a bigger issue down the road.

With salt, you can humanely and efficiently rid your home or property of rodents without using harsh chemicals or traps. It’s safe for pets, children, and other wildlife—allowing you to maintain a safe and healthy environment.

Salt is an inexpensive and easy way to get rid of mice, so there’s no reason not to try it.

Why you shouldn’t use rodent poisons.

While they’re certainly effective at killing mice, rodent poisons pose a lot of risks. Mouse poison can be dangerous for humans and pets such as dogs if ingested or even just touched. Plus, the mice that have eaten it may die in your walls or other hard-to-reach places, leaving you with a nasty smell that could take days to go away.

Salt is the safer alternative to get rid of mice as it won’t cause any damage to your home and is non-toxic to humans and pets. It’s an effective way to get rid of the mice without having to resort to more dangerous methods.

Also, too much salt won’t contaminate the environment like rodent poisons can. This means you don’t have to worry about other animals or wildlife being affected by it.

After consuming salt, the mice simply flee to seek other water sources. Typically, they won’t find any and they’ll die off from your pet safe natural rat poison.

What happens to animals if they eat rat poison?

If one of your pets, or heaven forbid a child, eats rat poison, it can cause serious health issues. Rat poison contains chemicals that are highly toxic and can be deadly if ingested, even a small amount.

It can cause internal bleeding, seizures, difficulty breathing, and even death.

What to do if someone ingests rat poison? If someone ingests rat poison, immediately seek medical attention or contact poison control for guidance. The poison control phone number is 1-800-222-1222. Do not try to induce vomiting without professional advice, as it may worsen the situation.

Other ways to deal with pesky rodents.

If you continue to have problems even after trying to kill mice with salt, there are a few other methods you can use to deal with them. Some of these include—

  • Using mouse traps or live traps. Traps are an effective way to catch and remove rodents from your home without having to kill them. Throw some food on a sticky trap and wait for a mouse to come by to eat it. They’ll get stuck to the trap, and you can dispose of them afterward.
  • Baking soda as a natural poison. Baking soda is a natural substance with a strong alkalinity that is fatal to mice or rats when ingested. Within 24-36 hours of exposure, the alkalinity levels are beyond what they are able to handle, and they die without needing to mix the baking soda with poison or other substances.
  • Repelling the mice. Try using natural repellents like peppermint oil to keep mice away. This home remedy is great for when your travel trailer is in storage. We like to sprinkle a few drops of peppermint oil throughout. The scent of peppermint is a natural way to repel mice because the strong aroma of menthol irritates their nasal cavities, making it uncomfortable for them to stay in the vicinity.
  • Sealing up your home or RV. Make sure to seal any openings or cracks that rodents may use to enter your RV or home. This could be anything from tiny holes in the wall, to gaps around windows and doors.
  • Keep food packed away. If you don’t have anything laying around that a mouse would want to eat, then you’ll make it less likely for them to stick around your home. Keep all food in airtight containers and make sure that no crumbs or leftovers are lying about.
  • Hiring a professional exterminator. If you still can’t get rid of the mice, you may want to consider hiring a professional exterminator. They can come in and use more intensive methods, such as fumigation or commercial poisons, to get rid of the problem for good. If getting rid of mice is a fairly difficult process for you, we recommend going this route.
  • Bring on another animal to deal with them. Many experts recommend bringing in a cat or a ferret to deal with mice effectively. They’re natural hunters of these pests and will rid your house of them in no time. This is a more permanent solution to your mouse problem.

So can you kill mice with salt?

Absolutely! If done right, you can kill mice with salt and keep them from coming back. It’s an effective, pet-safe, and inexpensive way to get rid of these pests.

Just make sure to use it correctly and take the necessary steps to keep them away for good.


Matt Johnson

Senior Content Writer

Matt is an experienced camper and glamping enthusiast with a Master's degree in Wildlife Science from Texas A&M University. Authoring posts for GlamperGear, he shares his wealth of knowledge on picturesque campsites, luxurious accommodations, and the best gear for outdoor adventures. His passion for nature and knack for comfort in the wilderness make him an expert guide for your next camping endeavor.

Related Posts

5 thoughts on “Rodent Problem? Kill Mice with Salt

  1. Josh

    I never knew that salt could be used to kill mice. This is really helpful and I’ll definitely give it a try when we put our camper away for the season and see if it works for me.

  2. Richard

    I had no idea you could kill mice with salt. It’s good to know there’s a natural and safe alternative to poisons and traps.

  3. Liam

    I didn’t realize that mice couldn’t vomit! That’s interesting. Salt seems like a cruel way to kill them, but if it’s safe and effective, I might give it a try.

  4. Amanda B

    I’m definitely going to try using salt to get rid of mice in my RV. I’ve tried just about everything up to this point and they keep coming back.

  5. Thomas

    I’ve always been hesitant to use poisons around my pets, so I’m glad to learn about using salt instead. It’s a much safer option.

Leave a Reply

Your email address will not be published. Required fields are marked *