Motherhen I had a Cochin bantam go broody during winter and hatched out some chicks, one of which I still have. It seems fairly normal.
Regarding the broody train; I have heard that sometimes when a hen goes broody, other hens 'catch' the broodiness and become broody, never happened to mine, but it can happen. Hope this helps.
Also don't worry about the chicks intergrating, The others will know that the mother will beat the tar out of them if they touch her chicks, and depending on your rooster's age and personality, he may help the mother with her chicks by feeding them or keeping them warm. Hope this helps.
Regarding the broody train; I have heard that sometimes when a hen goes broody, other hens 'catch' the broodiness and become broody, never happened to mine, but it can happen. Hope this helps.

Also don't worry about the chicks intergrating, The others will know that the mother will beat the tar out of them if they touch her chicks, and depending on your rooster's age and personality, he may help the mother with her chicks by feeding them or keeping them warm. Hope this helps.