I'm worried about my hens - please help

I'm becoming worried about my hens.

We got our hens about 2 years ago. They were free to roam around the garden and at night they went to bed in their henhouse and i closed the door to make sure that they were safe overnight. Our hens were happy and they laid approximately 4 eggs between them every day.

Recently we aquired 2 ducks and we built a duck and chuck run which are joined by a connecting wire mesh door. The duck house is in the duck area and the hen house is in the hen area. Both areas are very roomy and safe and they mingle occasionally - supervised cos Peggy hen gets a bit bossy with the ducks.
Since moving into their chuck run my girls have stopped laying. We only get one egg per day now instead of 4 and this has gone on for 3 weeks.
The whole time they've been in their new area. Nothing else has changed. They still have their layer pellets mixed up with grit and cornmash throughout the day, they still have their porrige each morning and their corn on the cob at teatime and through the day they have carrot tops and goodies from the allotment and i'm constantly cleaning and changing their water to make sure that all their needs are attended to.
We made them perches to sit on, i buy untreated turf for them to peck at, they have an area near to their favourite tree where they can dustbathe, and as usual there playing area is kept really clean. They have sunny and shady areas within their run, so they can lounge about wherever they like depending on the weather and their mood.

Is the reason for stopping egg production down to their move? or is there a problem here? I can't think of any reason why they should have stopped other than the fact that they don't like their new place.

I thought that they might have got red mite, and i checked them all thoroughly but couldn't see any. I checked inside their henhouse which is kept very clean and i couldnt see any there either, but nevertheless i went to the chicken supplies shop, got some red mite powder and gave them all a dusting. But still we're only getting one egg.

Their apetites are good and they seem healthy, but i'm a bit lost as to why they've stopped laying all of a sudden.

....Can anyone help me please cos i'm a bit worried about my girls.

I agree with TMG, think they just could be having a break.
Maybe cut down on their "extras" so they have more layers pellets, might help boost calcium, perhaps a little cod liver oil and a tsp poultry spice once a week just to make sure they are getting all their minerals for laying.
It sounds like they are very healthy and well cared for!

Hi, Sounds like your chickens are much loved and very well looked after and have everything they need !

I've noticed with my hens that an upset really does effect their laying ! I had 4 chickens and introduced another 2 and it upset them so much they all stopped laying for over a week and one of them for over 3 weeks ! then when my neighbour got a rooster a few weeks ago they stopped laying again as his visits upset them, although they seem to have started again now. So it could well have just been the move, although a few friends of mine have found that their chickens have stopped laying so well in recent weeks for some reason (Heat ? or just having a rest ?), I would try not to worry to much but let us know what happens !

No thats not red mite, just little black flies,wont do any harm. Squidge a red mite and you get a little red smear

well i cant wait for the day u come on here an shout out u have a full house  .

i am havign to turn ppl away on my site has ppl are pumping my girls with all thier cabbage leaves etc etc and some wont seem to listen that i can supply my own food so i dont need thiers , once in a while is ok but not everyday when someone has a clear out .
once i was almost given a week old bag of cooked veges that this person said was fine for my girls well i was nearly sick when she opened the bag an i was quick to reply get that in the compost bin .

i'm giving my girls small amount of veges every other day or so as i dont want over weight birds .