I had one BA that went broody this last spring. Well I already had too many chicks (7) in an isolated part of coop.
Well chicken math being being what it is, I got the BRILLIANT of getting her some young chicks from farm store. Husband in tow I search out the selection at our 2 farm stores. Oh my the one is selling Ameracaunas! I think to myself colored eggs!! Bonus. MY dear hubby falls for the cute little ones with cool stripe down their back! I think to my self " this is working out GREAT" So at the clerks advice I dive in and swoop up a few Okay 4 but who's counting we need different colored ones to tell them apart right? So we go home and stuff under the broody black growly hen. Well they love the warmness under her but after a day they jump out and start to look for food and water.! Well she's so new or their too old we give up and put them in a brooder with other chicks. I had made a small opening in chicken wire wall ( that seperated coop in half) for the 8 week olds to get through and explore their new digs.
Well you guessed it she shoves her HUGE feathered self to the other side! Okay we'll try it again. Maybe if we isolate her and chicks in corner of brooder area. Well.l.l she flips out flys out and flips out all chicks . Mind you this was while my hubby was chick sitting! So he crawls in gets broody DUNKS HER!, repairs hole, and separated all chicks from hens. So IMHO get EGGS not chicks. That's my story if you've made it this far thanks for letting me ramble on.