Ivie it might be worth it to watch your hens for a day. Do some linger on their eggs longer than others? . What breeds do you have? Some breeds have more tendency to broodiness than others. Cochins, silkies, australorps, orpingtons. There is also the pressure of a clutch of eggs against a hen's breast that can trigger broodiness some claim. So building a nest with 4 golf balls or ceramic eggs maybe and an extra dark nest box..? As the spring wears on and egg laying cycles tend to wane those hormones tend to come to the surface. Usually production type layers have the broody gene practically bred right out of them.
A hen sitting very flat on a nest. Not roosting at night. Lots of bick-bicking. Those are the signals you have a broody
Ahhhh thank you. So this RIR has been a little broody and I have just the right broody nest box for her. I have been keeping the two RIR separate from the other three hens and Tom because he just goes after them time and time again. They are wearing saddles now to help their poor backs heal - hopefully they will heal. Oh! but I already told you that. Dah!