Thanks. The more I think about it the less concerned I am about broody JGs. We're going to have separate layers and try some Dorkings as well, I can stick eggs under another broody hen to avoid getting them smashed. I'm toying with the idea of seeing what a JG Dorking cross might end up like, maybe a good compromise between size and broodiness is in my future.
Dorkings are super broody. And will hatch out others for you. Do you have any hens?