I once had a d\'anver hen that never laid an egg but was very broody every spring. And I mean VERY broody. For months she would sit anywhere - on a nest, on plain wire, on the bare ground, even on a clump of grass after we mowed the yard. I would eventually give her a few eggs so she wouldn\'t starve to death. She hatched big chicks, little chicks, bobwhites, mallards, turkeys, and pheasants. And loved them all. We called her Faith because she was full of it.
Then I had another d\'anver hen that laid like a machine but would attack all things small and cheepy. I know chickens don\'t have teeth but I swear she could snarl. Needless to say, Miss Cujo had a tragically short life.
They were full sisters. Go figure !! :0)