How to get rid of a Serious Red Mite Infestation.


I went on holiday for a couple of weeks to come back and find one of my chicken houses was full of red mite! Not just on the ends of the perches but in every crack and crevice and in every corner. Red Mite are notoriously difficult to remove once they get a grip on a chicken house. When the weather is warm, red mite multiply very quickly and before you know it, you’ve got a serious infestation to deal with.

Dealing with a serious Red Mite outbreak.

So how do you deal with such a serious red mite infestation? Normally, for small numbers I would wash the house down with poultry shield and use a number of other red mite products here and there to kill off these unwanted visitors but with so many mites in the chicken house, more serious action was required. Here’s what to do:

Allow yourself a good couple of hours…

  • Clean out the house, remove all loose bedding material. Strip the house down as much as you can. Remove as many parts as possible including pop holes, automatic pop hole openers and anything else that will unscrew easily.
  • If you have a felt roof, remove this – yes, unfortunately you will need to re-felt the roof. If you don’t you will find millions of red mites will still live happily under the felt.
    Cleaning the chicken house to remove red mites

    Cleaning the chicken house to remove red mites

  • Using a high pressure hose / pressure washer, wash the house and parts down. Get the spray in every crack and crevice. This will take about 45 minutes if done properly. If you miss a crack, hundreds of mites could be hiding in there so it’s really important to ensure you get into everywhere possible. The spray will bounce back and soak you at times so wear old clothes and be prepared to get wet.
  • Wait for the house to dry 10 to 15 minutes. Now look at it carefully – you should see red mites crawling around. These are the guys you missed that are coming out because they have been disturbed and are wet.
  • Go over the house again from top to bottom, again concentrating on the cracks.
  • Spread generous amounts of Diatom on the bedding material.

    Spread generous amounts of Diatom on the bedding material.

    Repeat the above process as many times as necessary until there are very few mites coming out. The more you remove, the better. Even small populations can multiply quickly.

  • Put your house back together. If you had a felt roof, leave re-felting until you are mite free for a couple of weeks. A temporary waterproof material should be used – plastic is ideal.
  • Sprinkle a generous amount of diatom onto the bedding. The manufacturers recommend 500g per M2 which is quite a lot.
  • Put a handful of diatom into your hand and rub it
    Diatom should be rubbed into perches

    Diatom should be rubbed into perches

    into each perch, taking particular care around the ends and the underside. Whenyou have finished it should be white and smooth, like a gymnasts bar.  Red mites have to crawl over this to get to the chickens at night.

Monitor the house for a few days, particularly on perch ends and re-apply diatom to the perches every couple of days or as soon as it starts to wear off.

If you have got into all of the cracks successfully, you should notice a drastic reduction in the number of red mite in the house – if you still find reasonable numbers, make up a spray mixture of poultry shield and spray onto these areas using a hand held plant mister.

Continue using diatom for a few weeks until there are no more signs of red mite.

You will find an article on Red Mite with lots more information on the main poultrykeeper site, there are also other posts about Red Mite in my blog – (select ‘Red Mite’ in the Tag cloud to see them) including My Top 4 Red Mite Products

If you have any other tips on controlling red mite or would like to leave a comment then please feel free to do so below.

You can buy Diatomaceous Earth on Amazon – see the advert to the right. There is also a large 1Kg tub for sale on there with a shaker that is useful too. I refil my shaker from the large tub as it’s easier to apply and less wasteful.

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  1. #1 by Tim Daniels at August 25th, 2010

    Hi Pam,

    Gosh that was quick I must say… to be honest I think it’s hard to say that it was Red Mite – however, if they weren’t in top shape to start with, it is possible that the stress of the move plus a large amount of Mites biting them killed them. It usually takes quite a while (weeks) to run the birds down, they stop laying, combs go pale, will often be reluctant to go in the house, then get pale combs and start to fade.

    If you are finding them on her (daytime?) are they not Lice? They are fast moving long 1 to 2mm and skin / pinky red colour. You find them around the base of feathers, often in warm places like under the wings and near the vent. Red Mite are tiny, slow and can be found in the cracks -or – on the underside of perches (wipe a white tissue under here in the dark and look for blood stains).

    The pressure washer is good because it gets them out and displaces them, some will crawl back but if they do, there’s the diatom. It does take time and you have to repeat over and over (less than their 7 day lifecycle so they can’t lay more eggs). Make sure you rub the diatom into the perch on all sides so it is dusty like a gymnasts bar… Good Luck.

  2. #2 by Helen at August 25th, 2010

    Tim. Wow, thank goodness I found this website and blog! I was getting myself in a right state worrying about my chickens and the severe infestation of red mites. You have given me some great advice to go and try asap. I had been using Diatom for the last 18 months, initially to try and erradicate the lice that some of my ex-battery hens had got (although this doesn’t seem to have helped) and was in complete denial that we would ever get red mites. It was only when I was cleaning the hen house out about a month ago that I noticed that the wood appeared to be actually moving it was so covered in mites. I then scrubbed the coup with Jeyes liquid and ‘scattered’ Diatom powder around the perches and laying boxes only to find that the little buggers were back within a day or two. I now realise that I have been far too mean with the Diatom powder and am going to dust like crazy in the morning and then power wash at the weekend (am working until then!!).
    My poor chickens, (not all ex-batts) they look so pale and fragile. We have 10 chickens and have been barely getting 1 egg a day. I feel that I have really let them down and will be much more vigilant from now on. On a positive note, one of my girls roosts in a tree outside the hen house and she looks great!!

    Thanks for your time and effort in supporting and advising all us worried hen lovers. x

  3. #3 by Tim Daniels at August 26th, 2010

    Hello Helen,

    Don’t beat yourself up about it – it happens to us all. The good news is, once you have seen them and know the signs, you will spot them earlier next time and then they are easy to control.

    Diatom does work on Lice – but they will avoid it and it does (like most ‘organic’ treatments) take time to work. The birds need regular dusting. I must say though a couple of lice won’t hurt them – if they have access to a dust bath, they should be able to keep the lice numbers down themselves. You can add diatom to their dust bath too.

    The secret to getting the Red Mite under control though is getting the water to wash them all out of the cracks and making sure to get a meal they HAVE to crawl through the diatom. Keep those perches dusted – rub it in with your hand – give your hens a gymnasts bar! Then repeat as much as necessary but before 7 days is up (the life cycle of the mite when they can lay eggs again and multiply rapidly). Poultryshield in a small hand spray bottle is useful to zap cracks of mites mid week when you haven’t time to clean the coop out.

    If you have a felt roof, you may need to take the felt off to get to them depending on where they are and how bad the infestation is.

    The lack of eggs, pale combs, anemia and the bird in the tree is the classic sign…

    Good Luck!

  4. #4 by bryony trafford at August 27th, 2010

    This site has been so helpful. One of my four chickens was nearly dead three days ago, now she is fit and well again, just a bit pale. She was like a ghost chicken, and then I found the red mites, terrible. They were everywhere. I have used red mite powder, total red mite kill powder, every day, red mite kill liquid in all cracks, they come out and die. I am still finding red mites on me and the screen of the laptop! vile creatures. I still have a way to go, I think and the chickens are on seaweed supplement for their iron levels. Is this enough? I have also bought duramitex plus and will treat with that tomorrow. I am neurotic about the cats who want to investigate and are banned because of the permethrin. Horrible red mites. I will never fail to spot them again.

  5. #5 by Tim Daniels at August 28th, 2010

    They should make a full recovery if you can get rid of the mites. Boosting their recovery with a suppliment is an excellent idea but don’t forget free range works better than anything as it allows them to find extra things to eat- even if you can just let them out for an hour each day, it will help them.

  6. #6 by bryony trafford at August 29th, 2010

    Thank you, I have them out as soon as they have eaten their vitamin enriched food. The hen house looks clear at night, I will treat it again, though, a few times. But I have picked the mites up and brought them into the house. They can’t breed, can they, so will they be gone after 7 days? I keep showering, etc; but they must be on the chairs, is the house permethrin spray safe with the cats? The chickens are looking good, so that’s one thing!

  7. #7 by jo at August 29th, 2010

    I have redmite in my own house. They came in on my trousers/boots from the coop. The whole family is getting bit and i have a constant crawling sensation which is driving me barmy. I have since rehomed the hens and now have mites all over my garden/drive and there out during the day. Its def redmite! out in full sun crawling everywhere looking for a new host. Any one had any joy getting rid of these things and what should i use in the house?? Im living in fear of them & I have a 8 wk old baby and im really worried incase they dont go away. Ive read horror stories on http://www.birdmites.org and They reckon permethrin doesnt work anymore. Any ideas of whats best to use from your own experiences?? im also in the uk with colder climates

  8. #8 by Tim Daniels at August 30th, 2010

    Hi Jo, Please see this post I made about Red Mites in your house: http://blog.poultrykeeper.com/tim-chicken-blog/will-red-mite-infest-your-house/

    I hope this will answer some of your questions. Personally I think Red Mites outside will die off naturally in time (there are many things that will eat them such as earwigs) and without a feed, they cannot lay eggs.

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