I raise Seramas and want mine to go broody, because I don't incubate the eggs, I just let them raise them. So I have never tried what I am about to tell, so I'm not sure if it works or not. But my grandmother, which I know she always had chickens, and she had her own little trick as far as I can remember for dealing with broody hens. She had mostly laying hens and when they would go broody, I remember her doing the following. She would go get an old bucket and fill it most of the way up with water, then she would add ice to it and let it set for a few mins. Then I remember she would go out and start getting the hens that had went broody, then she would take one at a time and dip their stomach's down in the ice water for a few mins. After that, she would take and put them in a cage for a few days and repeat the process a few more times and then would return them back to the pens. I was to young to really notice if it truly worked or not, but I may give it a try one day to see if it works or not. I think it would be an interesting to try or find out if anyone else has every tried this and fine out if it really works or not.