Hello my chickens stopped layin in July and has never layed again and im wondering if it might have something to do with the location of the chicken house and run it is always in the shayed so does that have something to do with my egg production ps. my chickens are all different ages so thought you should know).
Try adding light inside the coop ...on a timer to come on early enough to make their "daylight" equal to 12 or more hours. If they start laying after 2 - 3 weeks, then you have your answer....if they don't then you should investigate other problems that can cause them to stop laying.....parasites, mites, worms, lice, poor diet, lack of calcium,
IF I needed the eggs to feed my family and feeding the flock was weighing on my budget I would investigate all things at once. I would put wood ashes out for them to dustbathe in OR dust their little butts and underarms with Sevin powder. (use breathing protection)
Then I would worm them with whatever wormer the feed store recommends. Since they aren't laying anyway, this is the perfect time to worm them....won't matter if the product recommends "egg withdrawl" (meaning you can't eat the eggs for 10 days after worming)
Then I would go out and buy the best layer feed available (preferably with 20% or more protein content). And I would get some oyster shell calcium to mix in with the feed.
Then I would wash my waterers with bleach water (not too much bleach....1/4 cup to gallon of bleach is PLENTY) and refill them with a mixture of water and Apple cider vinegar with "Mother" in it....it's organic, usually....so look for Apple Cider Vinegar in the Organic section of the supermarket or Food Co-op. Regular Apple Cider Vinegar won't work...has to have the "mother" in it....making it cloudy to look at , but great for chicken's digestive system. 1 - 2 tablespoons per gallon of water is fine....if your waterers are smaller than a gallon add less, if they are bigger, add more. (it's not an exact science, but it does regulate their digestive system quite nicely)
IF, after all that, they didn't start laying by the end of March, I would order some more chicks at the Feed Store, butcher the ones I have, eat them and keep all the stuff I bought for when the new chicks grew up and started to lay. (Apple Cider Vinegar is good for everyone's digestive system)