I do have a silkie that is broody now, but silkies and cochins hardly count in my book, they spend more time broody than not. And it's quite contagious with that pen. I think I saw another hen sitting with her today. Could have just been for moral support, but I rather expect them all to be broody soon. Imagine if they had eggs to sit on. Maybe I will give them some eggs, they seem to enjoy it so much.
Wait for them all to go broody then give them each one or two eggs to Co-brood all together lol