She is my one and only person who knows anything about chickens and is interested in it.
I will probably hatch some chicks this year with broodies and she will be my first aid kit. I plan to raise them with broody, even thought she raised chicks in the brooder for years. I noticed that we didn't hatch a single hen that went broody for two years now. I hope that raising them with mother will help to get the instinct back.
No that will not encourage broodiness in the chicks. You could put leghorn eggs or chicks under a hen and the leghorns still won't go broody. On other hand, you can raise 100 generations of silkies or game chickens in incubator and brooders and these will go broody if you took a few and put in a coop or let free range. It is genetic, not learned.
I kind of like the combination of 'lays many eggs before going broody'... but yeah it gets frustrating sometimes when they are laying hundreds of eggs and not a single broody when you REALLY want to start hatching chicks.. sigh.