I have 7 hens (a mishmosh of silkie/mixes and golden comets) of varying ages (5 months up to 2.5). We get 1 or 2 eggs a week 
I have tried everything mentioned here (I did spend quite a bit of time reading here), but I just cannot figure out what the problem is.
I know we have a mosquito problem here, but hadn't realized just how bad until tonight. I went out to check everyone (we also have a broody due to hatch some eggs tomorrow). There must've been hundreds of mosquitos swarming the birds. They were shaking their heads, flicking and twitching the bugs away
That made me wonder if they are doing that all night long, they aren't sleepng well and have given up laying eggs? Is that possible?

I have tried everything mentioned here (I did spend quite a bit of time reading here), but I just cannot figure out what the problem is.
I know we have a mosquito problem here, but hadn't realized just how bad until tonight. I went out to check everyone (we also have a broody due to hatch some eggs tomorrow). There must've been hundreds of mosquitos swarming the birds. They were shaking their heads, flicking and twitching the bugs away

That made me wonder if they are doing that all night long, they aren't sleepng well and have given up laying eggs? Is that possible?