Never done them under a broody but rear a few 100 a year, I defy you not to fall in love with them, they are fabulous birds, I tend to keep them under the heat until 10 weeks raising the heat lamp higher as the time goes on, them they go out weather permitting as I am in Scotland into a covered run with house and plenty of straw, they can sometimes be a little dum so you need to ensure that you put them away at night etc, once they are grown to a reasonable size and fully feathered then mine free range and roost in the barns on a night. I have kept chickens and turkeys together free ranging and enclosed and as yet have never had a case of blackhead.