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Rat problem in your chicken coop?

Here are 5 things that won't work - and a link to my checklist of what will!

So you have a mouse or a rat problem in your chicken coop.

You never want to think it will happen to you - and then, one day, it does.  Not because you have chickens - but because somehow, rodents are finding a way of getting in to your chickens' food.

What to do now?

Mice in chicken feed.This is what you don't want to see - mice having set up home in your chicken feed.

There are lots of ideas out there about how to get rid of rats and mice from your home and your chicken coop.  I have a lot of articles which help you know what will work for you - but here, I look at the five most popular ideas about what will "definitely" get rid of them - and I explain why they are all highly unlikely to have any effect at all.

And then, if you would like it, I offer you the chance to download my free checklist to help you know what you need to do to keep your chickens and their home happily free of rodents in the future.

Ultrasonic rat repellers.

There are many of these on the market, and they are sold at a considerable price

You'll see manufacturers singing their praises and making all kinds of claims for them, the most common being that they will get rid of more or less anything that moves - rats, mice, cockroaches - by transmitting an ultrasonic signal around the home which humans can't hear but rats and mice do hear and can't tolerate.

Cockroaches may be affected by ultrasonic repellents.Ultrasonic repellers may work for cockroaches, but they are useless for a rat problem.

Judging by reviews on some sites which sell them, some people swear by them - but not for getting rid of a rat infestation.  Cockroaches and crickets seem to be the bugs most affected by them (although some research disputes even those claims (2) ).

Here's the fact about rodents : they sing along with them.

Trust me - I've tried them all.  They simply don't work. 

But don't take my word for it - the Federal Trade Commission of America has repeatedly warned manufacturers about making these claims for the simple reason that there is no evidence whatsoever, anywhere, that they work for getting rid of a rat problem. (1)

So save your money.  Invest in something that does work - like a rat-proof feeder for your flock.

Chicken wire.

Chicken wire is very good for keeping chickens in - but it won't keep anything much out of your run, and it's certainly no deterrent to rats.

Chicken wire will keep chickens in - but nothing out.

Rodents have learned to be extremely resourceful in order to survive.  They can climb through (and up) pipework, they can swim, they can eat through metal. 

So a little chicken wire - with holes easily large enough to fit an entire family of rats - is absolutely no problem for them.  You will not get rid of your problem like this.

Dog / cat / ferret urine.

It's not as laughable a theory as some - but it's still not true.

Ferrets may look cuddly but they will kill chickens - and their urine does not deter rodents!

Ferrets - cute, but their unrine will not deter rats!

Here's the theory : rats are deterred by the urine of any animal they know to be a predator : dogs, cats and ferrets being the top candidates.

Here's the fact :  creatures which prey on rodents are actually fewer than you might think.  Their chief enemies are human beings; they're also vulnerable to attack from terriers, birds of prey and some snakes.  Do you really want to try to extract urine from a snake?

Rats are intelligent beings who have learned to live with their predators for centuries.  They know their smells - and it doesn't put them off setting up home somewhere they have free access to food.

So breathe a sigh of relief.  you don't have to try to get some urine from your pet cat.

Peppermint / essential oils / cayenne pepper / human hair.

Here's the theory.  Rats have a good sense of smell.  That much is true - they can smell out a feeder full of grain at some considerable distance.

The rest of the theory?  All rodents hate the smell of peppermint.  Or other essential oils, such as lavender, grapefruit or eucalyptus.  Or cayenne pepper.  Or human hair.  Take your pick.

Peppermint - gorgeous, but won't solve a rat problem.Peppermint - smells delicious, but no good for a rat problem.

Here's the fact :  Rats really are not bothered by the smell of peppermint - they will actually eat it.  They will certainly not pack their bags and leave if you hang sprigs around your coop.

Nor will they be phased by the smell of other essential oils, or cayenne pepper, or toilet blocks, or deodorant, or any of the other many, many things you will see advertised as "old timers' deterrents which definitely work".

They definitely don't work.

As for human hair, the theory is that rats don't like humans and will stay away from anything that smells of them.

Except of course - all rodents love to live where humans live.  They have learned that where there are humans, there's food.  And they love food.

And finally - can mothballs solve your rat problem?

Your grandma swore by them for keeping moths away from her woolly sweaters (and she always had that tell-tale sickly sweet smell about her). 

Mothballs - look tasty but are made from Napthalene.They may look tasty, but mothballs can kill.

Naphthalene, which is what mothballs are made of, has been found to be a highly toxic chemical which can cause cataracts and bleeding in the eye, and has been linked to serious illness and death.  

For that reason it was replaced by some manufacturers by Dichlorobenzene  - which has since been found to be carcinogenic. 

Despite that, both these chemicals can still be found in products on the market sold as rat and squirrel repellants. 

If their toxicity isn't enough to put you off using them as a way to solve a rat problem perhaps the fact that they have both been found to ineffective should.  They will not control any level of rat problem - and they can make you ill.

Steer clear of these.  They can look like sweets to children - they have that sickly sweet smell too - but they could prove fatal.

So what does work in getting rid of a rat infestation?

All you need to get rid of a rodent problem is to understand that rats have one-track minds.  Honestly. 

Rodents are not a problem because you have chickens.  A lot of people believe that, but it's really just not true. Rats and mice are driven by one thing - hunger.

Rats become a problem because they have access to your chickens' food.  

This page will give you a clear direction in terms of how to restrict their access to it - and get rid of your problem for good.

Get your free downloadable checklist now!

The checklist is a summary of all my articles about dealing with rats and mice in the chicken coop which can be found on this website, summarised in one place.

Click to get your free downloadable checklist!

It has links to relevant pages on this site if you need more information and it will lead you through the process of identifying and assessing the problem, dealing with it if you already have it, preventing it from happening again and staying safe while you do it.

Here's what it covers :

  • Rats or mice? - Make sure you know the difference
  • Protecting your coop against an infestation
  • Preventing rodents in the run
  • What to do if you already have a problem
  • How to make sure you stay healthy while clearing up after rats and mice.

Click here or on the button to download your checklist now!

Other pages you might find useful.


There is a lot of poor and misleading information available on the internet about dealing with mouse and rat problems.  In order to bring you facts which are as accurate as possible I rely not only on my own experience, but on scientific, peer-reviewed studies. 

These are some of the sources on which I have based the information contained in this page.

(1)  Federal Trade Commission of America :'Warning to Manufacturers and Retailers of Ultrasonic Pest Control Devices'.  May, 2001.

(2)  Gramicko, N and Tarasenko, K : 'Ultrasonic Pest Repellers : Solution or Scam?'.  Pub. International Association of Certified Home Inspectors, 2014.

(3) United States Environmental Protection Agency : 'Naphthalene - Hazard Summary'.  2000.

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