I do not see much slow down of production from my flock, but I am pretty far south also. I have not added light and probably won't for the chickens. However, I saw my Bobs stop in September and haven't seen an egg since. My quail house is just about complete and I will be moving their cage in and building more inside shortly. I was thinking of adding light and seeing if I couldn't spark production. I have many people asking for them in my area and am still building my flock. Has anyone who owned quail done this?