How many brooder boxes do you have. I've got 3 hens and a roo. They all use the deep hay filled dresser drawer nailed inside the barn wall, but none have gone broody. Purchased as pullets in November. Laying regularly one egg each daily, so thinking of incubator. Maybe they just like it very warm before brooding?I had 4 of 16 of my BAs broody late summer. These were all "hatchery" girls, hatched last december, and I just love the breed.
I will let my hens raise them next year. Its a lot of work, and our purpose is food supply and eggs.
My GLW (12) were breeder stock and only 1 went broody, all were over a year old.