Mice

I grew up in a log cabin in northern Minnesota and our home was frequently visited by mice. Most of the time, our cats controlled the mouse population. However, there were times when more were around than normal. Once, while buttering a piece of toast, I noticed tiny lick marks and little foot prints all over the butter in the butter dish. I did not eat toast that morning. On these occasions where the cats were unable to keep up with the mouse population, we would set out snap traps at night. Baited, as you may have guessed, with butter. At night we would lay in bed and listen to the snapping traps, ridding us of our house mouse problem. But you may not want to waste butter, so the following article will offer additional helpful suggestions.

The house mouse (Mus musculus) is a common nuisance in the homes of people all over the world. The average adult mouse is 3–4 inches long from nose to butt. The tail adds an additional 2–4 inches. House mice have large hairless ears and beady black eyes. House mice are, for the most part, nocturnal and are afraid of bright lights. However, if they’re hungry enough they’ll explore when it’s light out. House mice are opportunist omnivores. They will literally eat anything.

The Baby Mouse

A female house mouse can have 5–10 litters per year at an average of 6–8 baby mice per litter. This, in combination with the fact that a female mouse can begin reproducing at 6 weeks old, makes the house mouse a very prolific breeder. In the wild, a house mouse may only live for a year because of predation and food shortages. But in a home with a constant supply of food and protection from predators, a house mouse may live up to 4 years. That is unless you kill it first.

Best Ways to Get Rid of House Mice

get rid of mouse in house

Stop Feeding Mice

The first step in getting rid of house mice is to stop feeding them. This also happens to be the best way to get rid of rats, too.

Mice are in your home because they enjoy the shelter and food it has to offer. So, in order to eliminate the food source, you will have to keep food in sealed containers and clean up your house. Get out the vacuum and suck up all the crumbs on the floor, in the couch, under the furniture, and anywhere else food may have been left. Pet food is another major source of mouse food. Try only feeding the pets what they will eat in a sitting. If they get a little hungry, maybe they will start going after the mice.

Mouse-Proof Your House

In order to keep the mice out of the house, you will have to mouse-proof your home. Mouse-proofing inside your house is a waste of time if they can still get in from the outside. Walk around the exterior of your home looking for holes, cracks, and other possible entry points. Use a combination of steel wool (here on Amazon) and sealant to keep the mice from getting back in through any holes you find. Don’t forget to look under roof eaves as well. Also, make sure any ventilation covers have holes too small for mice to get through—½ inch or less. Make sure all exterior doors have a tight fit with no empty space underneath.

While you’re outside, make sure the garbage bin has a secured lid and that no garbage is laying around for the mice to eat. You may want to try Eco Defense Mouse Repellent (sold at Amazon) to help protect your stuff.

snap trap for mice

Set Snap Traps

Snap Traps are economical and reusable. It also almost always instantly kills the victim. A couple of times I had to finish a mouse off—not fun but not hard.

Trapping mice with a snap trap also gives you the gratification of knowing for sure that you got the mouse, something you can’t get with some other repellent or elimination methods.

Set the traps in places where mice congregate and use some butter or peanut butter as mouse bait. Check the traps on a daily basis, or more frequently if you have a lot of mice. Whenever we heard a trap snap, we would go reset the trap. We would catch 5 or 6 mice before we even went to bed. Use as many traps as you think is necessary. If you are emptying them frequently, set out more. We’d recommend these traps by made2catch sold on Amazon, as they’re easy to empty without having to touch the corpsified mouse.

Use Mouse Poison

Mouse poison may not be safe, but it is effective. Mouse poison is composed of blood thinner, and it will thin the blood of anything or anyone that eats it. If you have children or pets in your house, I would not recommend using poison. If you do elect to use poison, use covered bait containers to prevent others from eating it.

The other problem with using poison is that it does not kill immediately, giving the mouse time to find a nice hiding spot to die. In time you will become aware of the location, or at least a vague idea, by the stench a rotting mouse corpse provides. Would have been a lot easier to catch it in a trap.

I should note that there is a school of thought, held by many, that poison traps are inhumane and should be avoided. I will let you be the judge based on your personal opinion, but know that if you poison a mouse, the mouse does suffer a slow death. Also know that you create the risk of birds or other animals eating a poisoned mouse and getting poisoned themselves.

Clean Your House

Clear out attics, boxes, drawers, cabinets where mice live. After getting rid of the mouse problem, you may still have to find the nests and/or rotting mouse corpses. If you do happen to find a nest, don some gloves and a mask, and throw the nest away. Mice also like to pee and poop around their nests, so you may have more cleaning to do. Use a weak mixture of bleach water (1 Tbsp bleach to 1 gallon water) to sanitize the area. If you want a more effective and less toxic cleaner, try using an enzymatic cleaner. It has bacteria, which eat up the odor-causing stuff.

It is no surprise that there is a correlation between untidy homes and houses that attract mice.

Get Rid of Mice Naturally

Cats

Some domestic cats are great at catching mice. Not all cats have the instinct to kill mice; the ones that do are known as mousers. If you go the cat route, get a female cat. Females are better at hunting. However, they may leave dead mice in conspicuous spots so that you notice their gifts.

Generally speaking, houses with one or more cats rarely see mice inside.  We don’t know if the mice ever make it in, but if they don’t they don’t last long.  Even the kindest cat has an innate instinct to kill mice.

Dogs

Domestic dogs are not commonly used to catch mice, but a lot of dogs have the ability and will instinctively chase anything that runs from them. Dogs may be a good option as a preventative measure by keeping mice from prancing around your house willy-nilly.

Terriers, often smaller-framed dogs with excellent energy and agility, have long been known to be particularly effective against rodents.

Try a Scent to Get Rid of Mice

Mice are believed to really dislike some natural scents.  These include:

  • Peppermint oil
  • Cayenne pepper
  • Cloves

Any of these might keep mice away from a smaller area, but you run the risk of the mouse simply going to a place without the scent, but still in your house.  This can be a good way to keep mice out of smaller cavities in your home, or small garden sheds.

The best way to use scents is to soak a cotton ball in the oil of the scent.  We like buying bulk-sized peppermint oil (here on Amazon), soaking cotton in it, and then stuffing known gaps where mice like to move around with the cotton.  It also smells pretty good if you happen to get a whiff of it.

How do Mice Get in to My House?

Mice get in to your house by finding the smallest of holes, gaps, or openings to enter through.  It has been said that they can squeeze through a hole the size of a pencil if they have to, but if you have a nickel-sized gap, they will go in and out all day long.

Common places where mice might get in are the gaps between siding and a foundation, gaps around a garage or entry door, and holes in a wood foundation.  Any of those are no match for a mouse.

One tip is to go inside the house, basement, or crawlspace, and if you can get to a place with a view of the outside wall, turn all the lights off and look out on a bright, sunny day.  You might see a little tiny ray of sunlight, which can then allow you to ID the hole.

If you find one, stuff it with steel wool (here on Amazon).  Mice can’t gnaw their way through that.

A little mouse problem?

If you choose to neglect your little mouse problem, you may end up with a big mouse problem. Mice are fast breeders. In less than 5 months, those two mice will have 24 children, 64 grandchildren, and 500 great-grandchildren. That is with an average of 8 babies per pregnancy that all survive. OK, so it’s a total exaggeration, but it is possible. The point is that once you realize you have mice, you need to do something about it. Start by finding out what they are eating in your house. Keep eating areas clean of crumbs, and don’t leave uncovered food out for them to eat. Next, seal up the outside of your house to keep more mice from getting in. Remove waste and other food sources from around the outside of your house.

Use snap traps inside your house to remove and kill the mice still inside. Even after you suspect you have indeed gotten rid of house mice, keep setting traps and checking them on a daily basis for a couple months. There may still be juvenile mouse hiding in a nest somewhere. If you run across a nest, use gloves and a mask to dispose of it. Geez, maybe you should get a cat. If you do, get a female cat, as they are better mousers.

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About the Author

Julianne Ragland