I live in nortwestern fl and had about 5 to 6 eggs a day from only five chickens!!! But in the last month egg count went down to 2 or three. Have one hen that went broody so that may account for one egg a day. I have killed a corn snake recently in the back yard that was going in the direction of the coop. Also my neighbor doesnt store his dogfood properly andon occasion seen rats. We lost three fertilized eggs from broody hens nest last night. Any suggestions. Do i need to change feed brands try adding some 7way scratch or do you guys think its snakes or rats.