I have never had any luck with broody cages or even the broody dunk in cold water. When the hormones really get going in some hens, there is no stopping them. And trying to break them can actually cause depression in the hen. I have found that by just letting the broody hen sit there, on nothing, getting her out of the box several times a day, she gets bored with it. At least that is how it goes in my flock. Among my other broodies, I have one hen that is very a determined broody that every year starts in with the broodiness in May and doesn't stop until September. On and off she goes broody. I have tired in vain to break this broody with the cage method, cooling her brood patch in water, locking her up some place away from the coop...and nothing. She will set anywhere, any place. She will even brood the roost bar!!! LOL But I found if I just let her do her thing, she will set for about 10 days, and start back laying in a few days. She will go broody again a couple weeks later, only to set another 10 days and go right back to laying. When I attempt the breaking method, she refuses to lay at all. So at least I get SOME eggs out of this broody in the summer.
Good luck with your broody!
Thanks I have been kicking her out if the coop the past few days but others are picking. On her she just runs away and hides. Feel bad for the poor girl hope everything goes back to normal soon!