Some breeds/specific birds are prone to broodiness, so even no eggs/fakes in a nest won't make a difference.My daughter left some ceramic eggs in her nest box and half her flock are broody now!![]()
I think 1 fake per nest is plenty but shouldn't be enough to trigger broodiness, as they want a clutch to sit on. Obviously gotta keep picking up the real eggs as they get laid, so the "potential clutch" doesn't increase.