Interesting! I've been wondering this for awhile now, just watching my girls and having the eggs left in there made me wonderIt can trigger broodiness. It isn't a sure thing but about half the time I've had one go broody, it was when there were a bunch of eggs. Sometimes they go broody with no eggs though.
I think you're right.In my mind I'm convinced of it. If I gather the eggs several times a day I don't have much of a broody problem but if I get busy and leave a lot of eggs in the nests several days & overnight then 3-4 hens will go broody. Fact or just coincidence, not sure which.
I have several hens that have been in the Broody Jail 4, 5, & 6 times this year. If left on their own accord the same hens only go broody and hatch chicks twice a year.
If I put golf balls in the nest boxes, will that cause them to go broody?
I think you're right.
It can but it isn't that simple. First I would say, what breeds are you talking about and what time of year?
It is virtually impossible with hy-line poultry that have been selected to lay daily and not set. If you want them to set, make the nest attractive for such and keep golf balls or fake eggs in there. If you don't want setters, make the nest less attractive. Keep its light brighter and nest pad less comfortable.