Do OEGB go broody often?
Some do, Alex, and some don't. If you'll let them produce a clutch, many will make at least an attempt at brooding. Some decide they're really not into it, and others will fight you to keep you out of the eggs. When they truly go broody, you can get them to set on golf balls. I had 4 lemon blues set the same nest at the same time last year. There were always at least 3 hens on the nest. Hatched 3 different clutches under them.