Please note: Backyard chickens and rodents do not automatically go together. Rats and grain, however, do.
This page and others in this section exist to help you know what to do should you discover a problem.
Good husbandry is very important - and very effective - at keeping vermin at bay. Get rid of them first, using one of these methods, and then make sure they don't return by getting rid of uncovered grain.
Find out how, here.
This article covers the ten most common methods, my personal experience of some of them, evidenced research about the effectiveness of all ten, and the pros and cons of each.
My aim? To help you decide which one is best for your circumstances if you find yourself in the awful position of having rodents.
Having rats in the chicken house is something no-one wants to see. And telling the difference between rats and mice is not always easy.
It's tempting to see evidence and think "it's only a little field mouse, what harm can he do?"
I was so sure I could never have a rodent problem, so convinced it was just one little weeny mouse who just needed a bit of warmth in the winter.
By the time I accepted I had rats in my coop there was an infestation of three separate nests with dozens of rats.
And rats breed - quickly. It proved incredibly hard to deal with.
Please - learn from my mistake.
Don't leave it. As soon as you see any evidence, take action! It's not pleasant, but it must be done.
The question then is: how?
I'm neither advocating nor opposing any of these methods, with one exception.
I'm simply outlining the most common methods of rodent extermination and assessing them. Some I have used personally, others I have discussed with rodent control officers in the UK, all of them I have carefully researched.
Different procedures will suit different situations and different people. Not everyone will be comfortable using the same methods.
Your job is to gather all the information on each method and then make a judgement for yourself as to which would best suit you, your family, your situation and your chickens.
I have a free checklist of actions to take to control rodents, which subscribers to my weekly Chicken Digest newsletter receive twice each year.
It summarises in one place all the information from several different articles spread over this website.
If you'd like to receive it too, sign up to my Chicken Digest here.
I needed to use rat poison because the rodent infestation had grown so large by the time I recognised it that any other, longer-term way would have been potentially putting my chickens at risk of disease. Rats multiply very quickly.
But poison really should be a last resort. It's an unpleasant death for the rat, potentially dangerous for pets, livestock and people and not a topic to be taken lightly.
For that reason, I've given the use of poison an article all of its own. Find it here.
This is the method I have used ever since I brought the infestation of rats I had under control with poison.
It's kept the rodent population down very effectively.
These traps are powered by battery. The rat, enticed into the box by a yummy treat, steps on a metal plate.
This triggers an electric shock which kills instantly.
The main advantages are that it's relatively quick and the rat is killed without blood being spilled, which makes cleaning up easy.
It's also impossible for pets or poultry to fit inside, so they're safe for other animals. And they don't harm the environment.
For those reasons, this is my preferred method of rodent control. I've found these traps very effective for controlling both rats and mice - in the house and garage as well as in my chicken coop.
I have written a very detailed review of electronic rat traps, to help you decide whether it's a good method for you.
See my electronic trap review at this page.
Links on the rest of this page are "affiliate links". If you click on them and buy, I earn a small commission at no cost to you. I only recommend products I know and love and which I think will be genuinely useful to you. See my disclosure policy for more information.
How to use them.
Advantages.
Disadvantages.
Our neighbour uses this kind of trap. The rodent is caught inside, triggering the door to close. The rodent then has to be re-located.
The best humane traps are made of metal. You'll find information on making them from plastic bottles on the internet, but even mice can gnaw through a bottle in a matter of minutes.
Rats will take just seconds.
Advantages.
Disadvantages.
This is another option I've found which is very effective, particularly when combined with the battery operated trap (see here).
I live in rural Italy where feral and semi-feral cats are common and, because we have wheat and sunflower fields, we also have mice which attract feral cats.
When a mother cat had her litter in our shed, then, I had no problem in inviting them to stay. Good decision!
If you're thinking of getting a cat to keep control of the mouse or rat population it really needs to be a large feral or barnyard-type animal which is used to living outside. There's a good chance that it will have been taught by its mother how to tackle the problem.
Most smaller, domesticated cats are unlikely to have the courage to take on a full-grown rat.
Be careful, though, about how any cat reacts with chickens. It's fairly common for cats to kill baby chicks - after all, to a cat they look just like birds - and some will even take on full-grown hens.
I used to work in an old, overcrowded Victorian prison in northern England. There was a massive problem with rodent infestation because the drainage system was old and over-used.
The prison authorities dealt with it by paying the local Border Terrier and Jack Russell Terrier clubs to come into the prison once a month, after dark, and let their dogs loose in the yards where the rats were running. Watching the dogs 'at work' was mesmerizing!
This is a fascinating video by the BBC, showing terriers at work killing rats on a farm in the UK.
If you're at all worried about this method of getting rid of vermin, please - don't watch it.
Advantages.
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Is it legal? And how does it work?
Yes, it's perfectly legal. Although in Europe personal use of firearms without a certificate is illegal, it is perfectly legal anywhere to shoot vermin as long as it's on your own land and you use an air rifle.
If you have permission, it's also legal to shoot rodents on someone else's land.
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What they are.
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I've had experience of these because they were used by a private rodent control company in the UK, in my workplace which had become over-run with mice.
How they work.
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These may work on bugs (although even that is questionable) but there are no scientific studies at all which have found them to be effective in getting rid of rats.
Indeed, manufacturers have been repeatedly warned by the Federal Trade Commission of America not to continue to make false claims about them.
See here for more information.
How do they work?
Ultrasonic repellers are small devices which plug into an electric socket and emit a very high pitched noise which is not heard by the human ear, but which rodents - supposedly - dislike.
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Disadvantages.
I have written several articles about getting rid of rats and other rodents which I hope you'll find useful.
Click the buttons to go to whichever you think might help.