My coop is designed to hold 10 to 12 large breed chickens. I follow the formula of 1 nest box for every 4 birds, so I built in 3 nest boxes for the layers....Though I only have a small flock of 4 birds. :/
The numbers are all over the place on this topic...even the published data has a certain degree of varience in what the right ratio should be...I simply go with what I was taught to go with for the ratio of nest boxes and that is 1 box per every 4 layers....course in my own backyard project I...