I already have five adult hens who are all siblings. Recently, the people at the barn where I board my horse just rescued a small chicken from s neighbor who moved. It is a tiny white bantam chicken but I can not tell the gender. They now realized they can't keep the chicken because it keep pooing on the horse tack so they need a place to keep it. Would it be okay for me to keep this tiny little Bantam chicken with my five large ISA brown hens or would they pick on the little one too much. We have a large run but they also don't free range.