My hens stoped laying eggs since the sumer and this is not the norm for them. All of them stoped laying, not a single one is producing eggs. They all lock strong, active and healthy as usual. This is the first time something like this happens. This was a really bad sumer; lots of nonstop rain, humidity, swampy conditions on the yard and a lot of mosquitoes. This is something that constantly happens every sumer, just that this year was worse; never the less I've had years like this before. The onlly problems I've had regardind deseasess is roup, which I literally have erradicated through culling off the really sick birds and allowing to live them who exibit little to no simptoms and recover quick; and chicken pox which I have greatly reduced through the same method. Is there any desease that can make a hen stop producing eggs while still looking healthy and strong ?? If by the spring of this year they dont start laying, I'll be really concerned. Thanks.