I have two light brahma hens and I was wondering if they are a breed that goes broody easily. Is there anything I can do to encourage them to go broody? They are a year old now. Also I have two roosters, one grew up with these two girls but neither rooster will mate with them but is not related. It looks like only the one who grew up with them goes for the old hens (12+ yrs) and the other is a bantam and can't seem to tackle the bigger girls. Are my two little ladies just unattractive to these roos?