I have 5 buffs, 5Jersey Giants and two Marans among various other birds including a Molted java... None of the Buffs have went broody (yet) one of the Jerseys just hatched 5 chicks and both the Cukoo marans tried ( one failed the other I broke) my Molted Java is around day 14 of her 3rd clutch this year... The other above listed birds are all 7 months.
half of what is said about black australorps is a big lie ,trust me they sometimes even abandon the chicks! ours only hatch 1/10 of the eggs they sit on