I live in Northern Michigan. I have 32 chickens, assorted breeds. A month ago I only had 28 chickens 1-3 years old. They were laying 17-23 eggs per day. 3-4 weeks ago we had some very hot days and I added 4 one year old chickens to the flock. We have continued (like most of the country) to have very warm weather. Egg production has dropped off to 10-13 eggs per day. The color of the yolk seems to be paler, not the deep rich color I usually see. Throughout the hot weather, the chickens have always had plenty of fresh water. They are not in direct sunlight as their coop is back among the pines behind the house. Also, two of the hens are brooding right now.
Over the past two years I have not seen this sudden drop in production in the summer. I have seen it when they molt and in the winter it drops of some but this surprises me. Any thoughts from anyone?